What is *Time Travel: A History* about?

*Time Travel: A History* by James Gleick explores the cultural and scientific evolution of time travel as a concept, tracing its origins in H.G. Wells’ *The Time Machine* to its influence on modern physics and literature. The book examines how technological advancements, philosophical shifts, and science fiction shaped humanity’s understanding of time, weaving insights from Einstein, Borges, and pop culture.

Who should read *Time Travel: A History*?

This book is ideal for fans of science history, literary analysis, or physics enthusiasts. Gleick’s accessible style caters to readers intrigued by how ideas like time loops and paradoxes emerged in fiction and migrated into scientific discourse. It’s particularly rewarding for those familiar with works by Wells, Vonnegut, or *Doctor Who*.

Is *Time Travel: A History* worth reading?

Yes—critics praise Gleick’s blend of rigorous research and engaging storytelling, calling it “mind-bending” and “a masterclass in interdisciplinary analysis.” A Pulitzer finalist, it offers fresh perspectives on time’s fluidity while contextualizing time travel’s role in art and science.

How does H.G. Wells influence *Time Travel: A History*?

Wells’ *The Time Machine* serves as the book’s starting point, framing time as a navigable dimension. Gleick argues Wells’ 1895 novel catalyzed cultural fascination with time travel, coinciding with innovations like railroads and telegraphs that reshaped perceptions of temporal linearity.

What role does physics play in the book?

Gleick bridges fiction and science, showing how Einstein’s relativity and quantum mechanics borrowed metaphors from time-travel narratives. The book highlights physicists’ debates about closed timelike curves and the “block universe” theory, illustrating science’s debt to speculative fiction.

What are iconic quotes from *Time Travel: A History*?

Notable lines include Wells’ assertion that “there is no difference between Time and any of the three dimensions of Space” and Gleick’s observation that “time travel is a fantasy of the modern era.” These emphasize the concept’s novelty and its challenge to intuitive time perception.

How does *Time Travel: A History* compare to Gleick’s other works?

Like *Chaos* and *The Information*, this book synthesizes complex ideas across disciplines but focuses on a singular cultural motif. It shares Gleick’s trademark depth but is more narrative-driven, appealing to both fiction fans and science readers.

What critiques exist about *Time Travel: A History*?

Some readers find its dense historical details overwhelming, while others desire more technical physics. However, most acclaim its ambitious scope, with *The New York Times* noting it “redefines how we view our relationship with time.”

La Machine à explorer le temps

Une histoire de voyageurs

James Gleick

3.58(4668 Reviews)

Aperçu de La Machine à explorer le temps

De H.G. Wells à Einstein, « Time Travel » de Gleick explore l'obsession de l'humanité à vouloir courber le temps. Nommé parmi les meilleurs ouvrages de 2016 par le New York Times, il révèle comment les horaires de train et les télégraphes ont déclenché nos fantasmes modernes de distorsion temporelle. Quel paradoxe résoudriez-vous en premier ?

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Chapitre 1

When Time Became a Traveler's Tale

Have you ever wondered what it would be like to step into a machine and emerge in ancient Egypt, or to witness Earth's final sunset billions of years from now? Time travel captivates our imagination like few other concepts, and it all began with H.G. Wells. His 1895 novel "The Time Machine" didn't just popularize an idea-it created one. Before Wells, the concept of physically moving through time simply didn't exist in human thought. Today, time travel permeates our culture so thoroughly that children understand it instinctively. The book has influenced countless writers, from Stephen King to Kurt Vonnegut, and inspired filmmakers like James Cameron and Christopher Nolan. Einstein himself was reportedly fascinated by Wells' vision, keeping a copy of the novel on his shelf. What began as a Victorian thought experiment has become one of the most powerful metaphors for understanding our relationship with past and future, making Wells not just a novelist but a conceptual architect who fundamentally changed how humanity thinks about time itself.

Chapitre 2

The Machine That Started It All

In the twilight of the Victorian era, a young enthusiast known simply by his initials, H.G., created something unprecedented-not just a machine of "nickel and ivory, with brass rails and quartz rods," but an entirely new concept. Wells' nameless Time Traveller explains to his skeptical dinner guests-stock characters like the Medical Man and the Psychologist-that time is actually the fourth dimension, extending beyond the three spatial dimensions we commonly recognize. This wasn't just clever fiction; it was a remarkably sober scientific speculation emerging from Victorian mathematical thinking. Before Wells, time travel was barely conceived. While ancient myths contained stories of characters who slept for centuries or visited heavenly realms where time passed differently, the notion of deliberately navigating through time as one might travel through space was entirely novel. Wells' genius was in recognizing that the approaching turn of the twentieth century had created a new awareness of time itself. The expression "turn of the century" marked humanity's growing consciousness of time's progression, with newspapers and cities celebrating the advent of 1900 with electrical displays and grand pronouncements. Wells drew inspiration not just from bicycles (the cutting-edge technology of his day) but also from emerging motion picture technology-Muybridge's zoopraxiscope, Edison's kinetoscope, and the Lumiere brothers' cinematographe-all of which made visible aspects of time never before seen. These inventions allowed people to witness time manipulated, slowed down, and replayed, creating a cultural environment ripe for imagining more dramatic temporal manipulations. The Time Machine flowed from Wells's pen in fits and starts over years, beginning in 1888 as "The Chronic Argonauts" in the Science Schools Journal. He rewrote and discarded it multiple times before producing the nearly complete version for the New Review. Though Wells struggled with the writing, the story seemed to have its own momentum, as if time travel itself was an idea whose time had come-"arrows of the Zeitgeist" finding their target. What makes Wells' concept so enduring is how carefully he anticipated objections. He cleverly addressed issues like why the machine wouldn't be visible when passing through time ("diluted presentation"), how it avoided colliding with objects (by becoming "attenuated" and "slipping like a vapour through interstices"), and the dangers of stopping in occupied space. These thoughtful details established conventions that future time-travel writers would follow for generations.

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Chapitre 3

Time Travel Takes Flight

By the mid-twentieth century, time travel had permeated modern culture so thoroughly that 21st-century citizens can hardly remember when they first encountered the concept. It appears everywhere-in pop songs, TV commercials, children's cartoons, and adult fantasies. The cultural saturation extends beyond entertainment to scholarly pursuits, with neuroscientists studying "mental time travel" (chronesthesia) and philosophers using time travel paradoxes to explore metaphysics of change and causality. The 1960 film adaptation of The Time Machine, with its "steampunk sled with a red velvet chair," cemented the archetypal image of a time machine in popular imagination. This visual representation, along with the term "time travel" itself (which only dates to 1914, derived from Wells's "Time Traveller"), created a shorthand that required no explanation. As the concept gained popularity, the mechanisms for time travel diversified beyond Wells's machine. Edward Page Mitchell's 1881 "The Clock That Went Backward" featured a mysterious Dutch clock that reversed time when wound. Murray Leinster's 1919 "The Runaway Skyscraper" began with the Metropolitan Tower's clock running backward, sending the building and its occupants into the past. Max Beerbohm's "Enoch Soames" (1916) used a Faustian bargain with a devil who could "switch you on to any date" to send a failed writer to 1997. Hugo Gernsback, a Luxembourg emigre who arrived in New York at nineteen, played a crucial role in formalizing time travel as a literary concept. In April 1926, he launched Amazing Stories, the first periodical devoted exclusively to what he initially called "scientifiction"-"the Jules Verne, H. G. Wells, and Edgar Allan Poe type of story-a charming romance intermingled with scientific fact and prophetic vision." Despite paying writers poorly (when he paid them at all) and reprinting classics without permission, Gernsback created a cultural form that quickly transcended its trashy origins. Within the pages of these science fiction pulps, readers and editors began wrestling with time travel's logical problems. A 1927 letter in Amazing Stories questioned what would happen if a time traveler met his younger self. In 1929, Gernsback himself articulated what would become known as the "grandfather paradox" in Science Wonder Stories: "Suppose I can travel back into time... and I visit the homestead of my great great great grandfather.... I am thus enabled to shoot him, while he is still a young man and as yet unmarried... I could have prevented my own birth."

Chapitre 4

Einstein's Revolution and the Block Universe

While H.G. Wells was crafting fictional time machines, Albert Einstein was fundamentally revolutionizing our scientific understanding of time itself. Through his Special Theory of Relativity in 1905, Einstein demonstrated that while the speed of light remains constant for all observers, time itself is not absolute. This groundbreaking insight revealed that simultaneity - events occurring at the same moment - is actually an illusion, as no universal "now" exists across space. Different observers moving at different velocities experience their own distinct present moments, making time fundamentally subjective rather than absolute. This scientific revelation posed a direct challenge to philosophers like Henri Bergson, who had placed human consciousness and intuitive experience at the center of temporal understanding. Einstein's former mathematics teacher Hermann Minkowski dramatically advanced these ideas in his landmark 1908 lecture "Space and Time." He boldly declared that both space and time were "doomed to fade away into mere shadows," introducing the revolutionary concept of spacetime - a four-dimensional continuum where time serves as the fourth dimension alongside the three spatial dimensions. In Minkowski's mathematical framework, reality consists of "world lines" - continuous paths through spacetime that trace objects' complete existence from their beginning to end. Our common perception of time flowing or passing is, in this view, merely an illusion - we experience only three-dimensional slices of an eternal, unchanging four-dimensional whole. Though Einstein initially dismissed this geometric interpretation as unnecessary mathematics, he eventually embraced it fully, later writing that "the distinction between past, present, and future is only a stubbornly persistent illusion." This "block universe" concept suggests that past, present, and future exist simultaneously in a vast four-dimensional block of spacetime. An "omniscient observer" outside our universe would perceive all of time at once, with no meaningful distinction between different moments - seeing only what philosopher C.D. Broad called a "Rigid Universe filling space and time." This deterministic view, where past and future exist simultaneously and unchangeably, became a powerful metaphor in both theoretical physics and science fiction, influencing works from Kurt Vonnegut's "Slaughterhouse-Five" to Christopher Nolan's "Interstellar." While the microscopic laws of physics show no inherent preference for time's direction - they work equally well running forwards or backwards - macroscopic reality demonstrates clear irreversibility. Entropy increases in closed systems: coffee and cream mix, but never spontaneously unmix; eggs scramble but never unscramble. As Tom Stoppard's character Thomasina observes in "Arcadia": "You cannot stir things apart." This fundamental disconnect between reversible microscopic laws and irreversible macroscopic reality creates what physicists call "the arrow of time dilemma" or "Loschmidt's paradox." Modern physics reveals that communication and memory themselves are entropic processes - any transfer of information necessarily involves thermodynamics and entropy increase. The universe apparently began in an improbably ordered, low-entropy state and has been increasing in entropy ever since, giving time its apparent direction. This thermodynamic arrow of time explains why we remember the past but not the future, and why causes always precede their effects.

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Chapitre 5

Paradoxes and Philosophical Puzzles

Robert Heinlein's groundbreaking 1941 story "By His Bootstraps" explores the paradoxes of meeting oneself through time travel. Bob Wilson, a Ph.D. candidate working on a thesis about time travel, encounters a stranger emerging from a "Time Gate"-a hole in the air leading to the future. The stranger, who calls himself Joe, looks oddly familiar. As they debate whether Bob should step through the gate, a third man appears who resembles them both. Soon a fourth man calls to check on their progress. All four are actually Bob at different points in his timeline, creating a complex web of self-interaction where scenes repeat from different perspectives. Heinlein's story confronts two key philosophical problems of time travel. First is the continuity of self-language struggles to distinguish between multiple versions of the same person interacting simultaneously. The narrator awkwardly refers to "his earlier self" and "the third copy," revealing how unprepared our pronouns are for such scenarios. Second is the unsettling experience of self-perception, as Bob "decided he did not like the chap's face" when meeting himself-a discomfort that mirrors our everyday experience with mirrors, but intensified through the paradox of temporal displacement. The time-travel narrative inevitably confronts the problem of free will. When Bob meets his earlier self, he naturally wonders: Can't I do it differently this time? Yet despite believing himself a free agent, he finds himself unable to deviate from the script. The paradox is that all the Bobs must work diligently to fulfill their predestined roles while gradually realizing their actions are foreordained. The paradoxes of time travel have inspired more perplexing philosophical analysis than perhaps any other concept. While time travel is easy to imagine, philosophers like John Hospers have argued it's not just empirically impossible but logically impossible. In his textbook "An Introduction to Philosophical Analysis," Hospers presents a fundamental contradiction: "How can we be in the 20th century A.D. and the 30th century B.C. at the same time?" The question hinges on the deceptively simple phrase "at the same time," revealing how language itself creates logical traps when discussing temporal paradoxes. Kurt Godel, the century's preeminent logician, challenged this certainty. In 1949, for Einstein's seventieth birthday, Godel presented calculations showing Einstein's field equations of general relativity allow for "universes" with cyclical time-where "closed timelike lines" loop back upon themselves, defying conventional causality. While Einstein cautiously noted these solutions should be weighed "on physical grounds," Godel's closed timelike curves became irresistible to philosophers and physicists alike.

Chapitre 6

Traveling to the Past: Nostalgia and Alternative Histories

If you could take one ride in a time machine, which way would you go? Forward or backward? The choice reveals something fundamental about people, with both camps having their optimists and pessimists. Those choosing the past might worry about disease or historical prejudices, while others see opportunities for profit or reliving lost loves. Many backward travelers are driven by regret. E. Nesbit, a friend of Wells, pioneered time travel stories with "The Story of the Amulet" (1906). Unlike Wells's scientific approach, Nesbit used magic to send four London children-Cyril, Robert, Anthea, and Jane-into the past through a magical amulet. The British Museum serves as their portal to ancient Egypt, Babylon, and even Atlantis. Nesbit inadvertently created a time-travel subgenre where modern characters visit famous historical moments, a tradition that continued through Kipling's "Puck of Pook's Hill," the cartoon "Peabody's Improbable History," and "Bill and Ted's Excellent Adventure." Old houses frequently serve as gateways to the past in time travel fiction. In Jack Finney's 1970 novel "Time and Again," the Dakota apartment building becomes a portal. His protagonist Simon Morley travels to 1882 New York through self-hypnosis and immersion in period surroundings. Henry James used a similar device in his unfinished novel "The Sense of the Past," where his protagonist Ralph Pendrel-"a victim of the sense of the Past"-enters another time through an inherited London house. These stories share a common theme: the interlopers can witness history but struggle with whether they can truly belong to or alter the timeline they visit. Time travelers inevitably attempt to rewrite history, with Hitler being the most common target for assassination. From Ralph Milne Farley's 1941 "I Killed Hitler" to Stephen Fry's "Making History," writers have explored this temptation to unmake evil. But can history truly be changed? Alfred Bester's "The Men Who Murdered Mohammed" suggests time is entirely subjective-"like millions of strands of spaghetti in the same pot"-where each traveler can only move along their own strand. The butterfly effect looms large-Ray Bradbury's "A Sound of Thunder" demonstrates how stepping on a prehistoric butterfly cascades through millions of years.

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Chapitre 7

Time Capsules: Messages to the Future

Mid-20th century Americans attempted to communicate with the distant future through time capsules, a concept representing a modern obsession with preserving our present for future discovery. This fascination reflected both technological optimism and an unprecedented awareness of historical change. In 1936, Thornwell Jacobs, president of Oglethorpe University, announced his ambitious "Crypt of Civilization" project in Scientific American. This sealed basement vault, roughly the size of a swimming pool, was designed to preserve a record of contemporary "science and civilization" until its scheduled opening in 8113 AD - a date chosen because it marked the same time span looking forward as had elapsed since the first recorded date in human history. Despite grandiose claims about "burying our civilization forever," what Jacobs really interred was an eclectic assortment of everyday items: Lincoln Logs, aluminum foil, women's stockings, an electric toaster, and phonograph records of world leaders. The vault also contained microfilm copies of more than 800 classic books, seed samples, and even artificial teeth - creating an unintentionally quirky snapshot of 1930s American life rather than a comprehensive cultural archive. G. Edward Pendray, a public relations executive at Westinghouse Electric, created a more streamlined time capsule for the 1939 New York World's Fair. Instead of a room, Westinghouse designed a sleek half-ton torpedo, seven feet long, made of "Cupaloy," a special rust-proof copper alloy developed specifically for this purpose. Originally wanting to call it a "time bomb," Pendray coined the now-familiar term "time capsule." The media enthusiastically covered the project, with the New York Times suggesting its contents would appear "distinctly quaint to the scientists of 6939 A.D." The capsule contained items like a Mickey Mouse cup, cigarettes, seeds, and microfilm of contemporary newspapers. Time capsules represent a characteristically twentieth-century invention-a tragicomic time machine that travels at our standard velocity of one second per second while trying to evade entropy. Their creators fundamentally misunderstand both past and future, often selecting items more representative of current novelties than enduring cultural significance. The International Time Capsule Society estimates ten thousand capsules buried worldwide, with nine thousand already "lost"-their locations forgotten despite elaborate efforts using ground-penetrating radar, historical records, and even clairvoyants to find them. Notable examples include a capsule buried by Steve Jobs in 1983 that took 30 years to relocate. When people make time capsules, they disregard how humans have evolved a collective methodology for transmitting information into the future: culture itself. From cave paintings to libraries, from clay tablets to digital archives, we've created external memory systems-mental prostheses that outlast biological lives. Unlike the scattered time capsules, our distributed cultural storage systems-libraries, museums, monasteries, theaters-transmit symbolic memory across generations through constant renewal and reinterpretation. These institutions actively preserve and translate cultural knowledge, rather than merely entombing artifacts in hopes of future discovery. Modern digital archives and cloud storage represent the latest evolution of these enduring cultural transmission systems, though they face their own challenges of format obsolescence and data degradation.

Chapitre 8

The Many Worlds of Time

Borges's story "The Garden of Forking Paths" presents a labyrinth of symbols and time where paths fork not in space but in time itself. The fictional book within the story is "an indeterminate heap of contradictory drafts" that rejects Newton's uniform, absolute time in favor of "an infinite series of times, in a growing, dizzying net of divergent, convergent and parallel times." This network "embraces all possibilities of time." When Borges wrote this story in the 1940s, a young Hugh Everett III was devouring science fiction in Washington, D.C. Fifteen years later at Princeton, under John Wheeler's guidance, Everett developed what would become the many-worlds interpretation of quantum mechanics. Uncomfortable with the idea that measurement fundamentally alters reality, Everett proposed that every quantum possibility creates a branching universe. His theory suggests that in one universe Schrodinger's cat lives; in another, it dies. Despite initial skepticism and violation of Occam's razor, Everett's theory gained followers after his death, with physicist David Deutsch later asserting, "Time does not flow. Other times are just special cases of other universes." In Isaac Asimov's 1955 novel "The End of Eternity," we see a complex vision of time manipulation. Asimov reimagines eternity not as God's domain but as a bureaucratic organization outside normal time. The "Eternals" are stratified into castes (Computers, Technicians, Sociologists) who travel between centuries in "kettles" and make "reality changes" to alter human history. These men-no women allowed-believe they improve humanity by preventing wars and suffering, though they operate with 1950s sensibilities about gender and morality. Their tinkering prevents nuclear war but also blocks humanity's development of interstellar travel. Alternative histories have exploded as a literary genre, from Hitler surviving in the Amazon to Catholic theocracies ruling England. In Kingsley Amis's "The Alteration," a world without the Reformation features a disreputable genre called "Time Romance" with a subgenre of "Counterfeit World" stories imagining histories that never happened. These create fascinating "hall-of-mirrors" effects, like Philip K. Dick's "The Man in the High Castle" containing a book about the Allies winning WWII. Our shelves continue filling with counterfeit worlds as futuristic fantasies inevitably become alternative histories when their predicted dates arrive-like Orwell's 1984 or Clarke's 2001.

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Chapitre 9

Time in the Digital Age

In the era of time travel rampant, storytelling has grown more complicated. Literature creates its own time, mimicking it in ways that have evolved beyond simple linearity. While traditional stories proceeded from beginning to end in chronological order, modern narratives shatter time's dimension, employing multiple clocks, unreliable timelines, and temporal fragments. The 20th century introduced a roisterous temporal complexity to storytelling unlike anything before. Writers like Proust invented forms of mental time travel without machines, making time their canvas and subject. "The timescape began to replace the landscape," as modernists explored how memory, anticipation, and association create an unchronological narrative of life. Any book resembles the Universe Rigid-bound with a finality real life lacks. Books are "tangible pieces of time in our hands," as Ali Smith puts it, seemingly fixed yet transformed by each reader's engagement. Reading entangles your memories with the narrative, making every encounter unique-"You can't step into the same story twice." Today we're experiencing another temporal shift through persistent connectivity. We inhabit two contrasted realms simultaneously: cyberspace and the "real world," with time functioning differently in each. Communication that once occurred only in the present now tangles across time, with messages flowing in arbitrary sequences rather than temporal order. "Internet time" emerged as a concept in the 1990s, with Intel's CEO Andrew Grove declaring "We are now living on Internet time." In this new temporal reality, past bleeds into present while the future seems to vanish, "devoured by the all-voracious present," as J.G. Ballard observed in 1995. We've annexed both future and past-institutions recycle old content while nostalgia proliferates in various contradictory forms. The online world now offers its own ersatz immortality through digital persistence-Twitter accounts for the dead, Facebook memorialization, and startups promising to create artificial agents that continue posting after death. Yet the present remains elusive, flowing through our fingers. Psychologists suggest "now" is a rolling period of two or three seconds-what William James called the "specious present," that fleeting moment between immediate sensation and short-term memory. Time travel exists because we need to elude death. "Time is a killer," making dust of all things, confining us to "an eyeblink of time, an instant never to return." While religions offer immortality through souls and afterlives, time travel sets our imaginations free from mortality's constraints. As Vonnegut's Tralfamadorians explain, "when a person dies he only appears to die. He is still very much alive in the past." In our wired world, the present becomes a communal mosaic, crowd-sourced from multiple perspectives. As Virginia Woolf noted, we survive only because "the past shelters us on one side, the future on another." Our entry into both realms, however fleeting, makes us human. So we share the present with ghosts-characters from our time travel stories who become our muses and guides in the unending now.

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Thèmes clés dans La Machine à explorer le temps

cultural history of time
fourth dimension theory
literary origins of sci-fi
temporal paradoxes
evolution of futurism

Citations de La Machine à explorer le temps

it created one.
time itself is not absolute.
time is actually the fourth dimension.
time travel permeates our culture so thoroughly that children understand it instinctively.
time travel had permeated modern culture so thoroughly that 21st-century citizens can hardly remember when they first encountered the concept.

Personnages de La Machine à explorer le temps

H.G. WellsAuthor who popularized the concept of time travel
The Time TravellerThe nameless protagonist of Wells' 1895 novel
Hugo GernsbackFounder of Amazing Stories and sci-fi pioneer
Enoch SoamesWriter who makes a Faustian bargain to travel

À propos de l'auteur

James Gleick, l'auteur américain acclamé et historien des sciences, explore l'intersection de la physique et de la culture dans Time Travel: A History, mêlant récit documentaire et enquête philosophique.

Maître dans l'art d'expliquer des concepts scientifiques complexes à travers l'histoire culturelle, Gleick a chroniqué les révolutions technologiques dans des ouvrages à succès tels que La Théorie du Chaos (finaliste du prix Pulitzer) et Le New York Times : Une histoire, une théorie, un déluge (lauréat du prix Royal Society Winton). Ses livres, traduits dans plus de 30 langues, l'établissent comme une voix de premier plan pour rendre les idées scientifiques accessibles au grand public.

Diplômé de Harvard et ancien chroniqueur au New York Times, Gleick a cofondé l'un des premiers fournisseurs d'accès à Internet de New York en 1993, reflétant son engagement de longue date envers les impacts sociétaux de la technologie. Ses écrits paraissent régulièrement dans The New York Review of Books et The New York Times, consolidant son statut de pont entre le monde universitaire et le discours public.

Time Travel poursuit sa tradition de transformation de théories abstraites en récits captivants, retraçant l'évolution du concept depuis H.G. Wells jusqu'à la physique quantique.

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4.5K

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@SofiaP

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@Jaded_Falcon

201

"It is great for me to learn something from the book without reading it."

@OojasSalunke

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn

483

"Makes me feel smarter every time before going to work"

@Cashflowbubu

"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

@Moemenn

"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA

117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum

108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC

254

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful

4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon

201

"It is great for me to learn something from the book without reading it."

@OojasSalunke

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn

483

"Makes me feel smarter every time before going to work"

@Cashflowbubu

"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

@Moemenn

"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA

117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum

108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC

254

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful

4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon

201

"It is great for me to learn something from the book without reading it."

@OojasSalunke

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn

483

"Makes me feel smarter every time before going to work"

@Cashflowbubu

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Chapitre 7

La Machine à explorer le temps

AperçuAperçu de La Machine à explorer le temps

Un livre. De nombreuses façons de l'écouter.

When Time Became a Traveler's Tale

The Machine That Started It All

Voyez chaque mot au fil de l'écoute

Time Travel Takes Flight

Einstein's Revolution and the Block Universe

Profitez davantage de La Machine à explorer le temps : Une histoire de voyageurs

Paradoxes and Philosophical Puzzles

Traveling to the Past: Nostalgia and Alternative Histories

Voyez chaque mot au fil de l'écoute

Time Capsules: Messages to the Future

The Many Worlds of Time

Profitez davantage de La Machine à explorer le temps : Une histoire de voyageurs

Time in the Digital Age

Vous êtes arrivé au bout de La Machine à explorer le temps : Une histoire de voyageurs

Thèmes clés dans La Machine à explorer le temps

Citations de La Machine à explorer le temps

Personnages de La Machine à explorer le temps

À propos de l'auteur

Telecharger le resume de La Machine à explorer le temps : Une histoire de voyageurs

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1,000,000+ curious minds.

1,000,000+ curious minds.

Un livre. De nombreuses façons de l'écouter.

When Time Became a Traveler's Tale

The Machine That Started It All

Voyez chaque mot au fil de l'écoute

Time Travel Takes Flight

Einstein's Revolution and the Block Universe

Profitez davantage de La Machine à explorer le temps : Une histoire de voyageurs

Paradoxes and Philosophical Puzzles

Traveling to the Past: Nostalgia and Alternative Histories

Voyez chaque mot au fil de l'écoute

Time Capsules: Messages to the Future

The Many Worlds of Time

Profitez davantage de La Machine à explorer le temps : Une histoire de voyageurs

Time in the Digital Age

Vous êtes arrivé au bout de La Machine à explorer le temps : Une histoire de voyageurs

Les utilisateurs ont aussi aimé

Découvrir plus

Aperçu de La Machine à explorer le temps