Carl Sagan author photo

Carl Sagan

出生: November 09, 1934 – Brooklyn, New York, United States

Carl Sagan was an American astronomer, planetary scientist, and science communicator who made complex ideas accessible to broad audiences. He authored Cosmos and Pale Blue Dot, and wrote The Dragons of Eden, which won the Pulitzer Prize. As host of the television series Cosmos, he inspired millions of viewers worldwide to engage with science.

传记与作者历程

Carl Sagan was born in Brooklyn in 1934 and grew up in a working-class Jewish family that encouraged curiosity, reading, and faith in public education. Childhood visits to the 1939 New York World’s Fair and early encounters with astronomy helped shape his sense that science could enlarge ordinary life. He studied at the University of Chicago, earning degrees in physics, astronomy, and astrophysics, and developed the broad intellectual style that later defined his public voice. After research and teaching posts at Harvard and elsewhere, he joined Cornell University, where he became a professor and one of the most recognizable scientific figures of the twentieth century.

展开更多

名言

quote
Absence of evidence is not evidence of absence
-The Dragons of Eden
quote
I believe that the extraordinary should certainly be pursued. But extraordinary claims require extraordinary evidence
-Broca's Brain
quote
Imagination will often carry us to worlds that never were. But without it we go nowhere
-Cosmos
quote
That's here. That's home. That's us
-Pale Blue Dot
quote
For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring
-The Demon-Haunted World
quote
If you know a thing only qualitatively, you know it no more than vaguely
-Billions and Billions

发现更多

Faith Among the Stars
学习计划

Faith Among the Stars

This plan is essential for explorers and thinkers seeking to reconcile the harsh realities of deep-space physics with profound spiritual questions. It is ideal for those who want to find divine purpose while navigating the technical and existential challenges of the universe.

1 h 36 m3 章节
Astronomy
学习计划

Astronomy

Astronomy connects us to the vastness beyond Earth, offering profound insights about our place in the cosmos. This learning plan benefits curious minds seeking to understand celestial mechanics, cosmic evolution, and the frontiers of space exploration without requiring advanced physics or mathematics.

4 h 15 m4 章节
Secrets of a Strange Earth
学习计划

Secrets of a Strange Earth

This plan is designed for curious minds who want to look beyond conventional knowledge to understand the anomalies of our universe and species. It is perfect for lifelong learners and trivia enthusiasts seeking to bridge the gap between science, history, and psychology.

1 h 36 m4 章节
The Rise of Sapiens
学习计划

The Rise of Sapiens

This plan offers a profound look at the cognitive and structural shifts that defined humanity's trajectory. It is ideal for history enthusiasts and curious minds seeking to understand how collective beliefs and scientific breakthroughs shaped the modern world.

1 h 12 m3 章节
i want to learn about the universe
学习计划

i want to learn about the universe

This learning plan provides a structured journey from our local solar system to the furthest reaches of theoretical physics. It is ideal for curious minds and aspiring astronomers who want to bridge the gap between basic space facts and complex cosmological theories.

4 h 32 m4 章节
The Physics of Interstellar Survival
学习计划

The Physics of Interstellar Survival

This plan bridges the gap between theoretical physics and practical engineering for the future of humanity. It is essential for aspiring aerospace engineers, science enthusiasts, and anyone fascinated by the technical realities of becoming a multi-planetary species.

1 h 12 m3 章节
Study history, philosophy, science & the self
学习计划

Study history, philosophy, science & the self

This plan offers a multidisciplinary approach to understanding our place in the universe by bridging the gap between science and the humanities. It is ideal for lifelong learners and deep thinkers seeking to build a rigorous intellectual foundation and a more coherent personal philosophy.

5 h 33 m4 章节
The Informational Architecture of Reality
学习计划

The Informational Architecture of Reality

As we move beyond traditional materialism, understanding the universe as a computational process is essential for deep scientific literacy. This plan is ideal for thinkers, physicists, and philosophers eager to bridge the gap between abstract logic and conscious experience.

1 h 12 m3 章节

社区声音

"Carl Sagan, 62, the charismatic apostle of popular science"

The Washington Post

"Carl Sagan is very often right and always interesting"

TIME

"Planetary scientist and broadcaster Carl Sagan influenced some of NASA’s planetary missions"

Nature

"Carl Sagan, the astronomer, Pulitzer Prize-winning author, and legendary popularizer of science"

PBS NOVA

"Carl Sagan was arguably the greatest science communicator of our time"

The Guardian

"Carl Sagan erased boundaries between evolutionary biology, geology and astrophysics"

CBS News

"Carl Sagan helped broaden the reach of science to millions of people"

Barack Obama

"Carl Sagan has probably done more than anyone in the United States today to popularize the humanity of science"

The Christian Science Monitor

关于此页面的常见问题

由哥伦比亚大学校友在旧金山创建

BeFreed 汇聚了全球超过 1,000,000 求知若渴的学习者

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

@Moemenn
platform
star
star
star
star
star

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

@Chloe, Solo founder, LA
platform
comments
12
likes
117

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

@Raaaaaachelw
platform
star
star
star
star
star

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

@Matt, YC alum
platform
comments
12
likes
108

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

@Erin, Investment Banking Associate , NYC
platform
comments
254
likes
17

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

@djmikemoore
platform
star
star
star
star
star

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

@Pitiful
platform
comments
96
likes
4.5K

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

@SofiaP
platform
star
star
star
star
star

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

@Jaded_Falcon
platform
comments
201
thumbsUp
16

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

@OojasSalunke
platform
star
star
star
star
star

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

@Leo, Law Student, UPenn
platform
comments
37
likes
483

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

@Cashflowbubu
platform
star
star
star
star
star

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

@Moemenn
platform
star
star
star
star
star

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

@Chloe, Solo founder, LA
platform
comments
12
likes
117

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

@Raaaaaachelw
platform
star
star
star
star
star

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

@Matt, YC alum
platform
comments
12
likes
108

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

@Erin, Investment Banking Associate , NYC
platform
comments
254
likes
17

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

@djmikemoore
platform
star
star
star
star
star

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

@Pitiful
platform
comments
96
likes
4.5K

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

@SofiaP
platform
star
star
star
star
star

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

@Jaded_Falcon
platform
comments
201
thumbsUp
16

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

@OojasSalunke
platform
star
star
star
star
star

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

@Leo, Law Student, UPenn
platform
comments
37
likes
483

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

@Cashflowbubu
platform
star
star
star
star
star

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

@Moemenn
platform
star
star
star
star
star

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

@Chloe, Solo founder, LA
platform
comments
12
likes
117

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

@Raaaaaachelw
platform
star
star
star
star
star

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

@Matt, YC alum
platform
comments
12
likes
108

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

@Erin, Investment Banking Associate , NYC
platform
comments
254
likes
17

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

@djmikemoore
platform
star
star
star
star
star

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

@Pitiful
platform
comments
96
likes
4.5K

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

@SofiaP
platform
star
star
star
star
star

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

@Jaded_Falcon
platform
comments
201
thumbsUp
16

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

@OojasSalunke
platform
star
star
star
star
star

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

@Leo, Law Student, UPenn
platform
comments
37
likes
483

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

@Cashflowbubu
platform
star
star
star
star
star
1.5K Ratings4.7
开启你的学习之旅,就是现在