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It wasn't until our planet developed an ozone layer
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Cosmos: Possible Worlds

It wasn't until our planetdeveloped an ozone layer, about two and ahalf billion years ago,...

It wasn't until our planet
developed an ozone layer, about two and a
half billion years ago, that it was safe for life to
leave the ocean for the land

Full Transcript

00:00:01.000 --> 00:00:03.736
It wasn't until our planet developed an ozone layer,
00:00:03.769 --> 00:00:06.272
about two and a half billion years ago,
00:00:06.305 --> 00:00:09.508
that it was safe for life to leave the ocean for the land.
Duration
10 seconds
Views
22
Timestamp in Movie
00:32:18
Uploaded
Jun 01, 2025
Season
1
Episode
12
Genres
documentary, animation, family

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Movie Summary

"Cosmos: A Spacetime Odyssey" returns for a second season. Ann Druyan, original creative collaborator to Carl Sagan, serves as executive producer.
S01 • E08 And the Cassini spacecraft proved them right. - Cosmos: Possible Worlds 00:05
And the Cassini spacecraft proved them right.
S01 • E13 In the study of their contemporaries, - Cosmos: Possible Worlds 00:06
In the study of their contemporaries,
S01 • E05 In New York City, - Cosmos: Possible Worlds 00:06
In New York City,
S01 • E07 This intimate knowledge of the lives of the bees is the - Cosmos: Possible Worlds 00:17
This intimate knowledge of the lives of the bees is the
S01 • E02 The heartless selfishness of the rabies virus, - Cosmos: Possible Worlds 00:12
The heartless selfishness of the rabies virus,
S01 • E08 What is Earth's own Roche limit? - Cosmos: Possible Worlds 00:05
What is Earth's own Roche limit?
S01 • E06 The floaters may propel themselves through the - Cosmos: Possible Worlds 00:08
The floaters may propel themselves through the
S01 • E12 A single chlorine atom can destroy 100,000 ozone molecules. - Cosmos: Possible Worlds 00:07
A single chlorine atom can destroy 100,000 ozone molecules.
S01 • E11 These little stars may be lukewarm, - Cosmos: Possible Worlds 00:06
These little stars may be lukewarm,
S01 • E01 It's the story of two of the half dozen realms of life on Earth, - Cosmos: Possible Worlds 00:08
It's the story of two of the half dozen realms of life ...
S01 • E05 The waterworks and the electrical power system - Cosmos: Possible Worlds 00:05
The waterworks and the electrical power system
S01 • E08 If the Moon were ever to come closer than 12,000 miles, - Cosmos: Possible Worlds 00:08
If the Moon were ever to come closer than 12,000 miles,
S01 • E10 TYSON: Louis-Auguste Cyparis was arrested and taken to the - Cosmos: Possible Worlds 00:08
TYSON: Louis-Auguste Cyparis was arrested and taken to the
S01 • E13 This figurine is one of the only surviving remnants of their civilization. - Cosmos: Possible Worlds 00:06
This figurine is one of the only surviving remnants of their...
S01 • E11 Think of the continuity and growth potential of - Cosmos: Possible Worlds 00:09
Think of the continuity and growth potential of
S01 • E04 In preparation for what was coming, - Cosmos: Possible Worlds 00:09
In preparation for what was coming,
S01 • E06 Sagan and Salpeter imagined them arranged in great lazy - Cosmos: Possible Worlds 00:06
Sagan and Salpeter imagined them arranged in great lazy
S01 • E03 Any life passing through those cloud belts wouldn't have a chance. - Cosmos: Possible Worlds 00:05
Any life passing through those cloud belts wouldn't hav...
S01 • E02 It was the evolution of successively larger brains - Cosmos: Possible Worlds 00:11
It was the evolution of successively larger brains
S01 • E09 Those choices amounted to nothing more than random chance, - Cosmos: Possible Worlds 00:09
Those choices amounted to nothing more than random chance,