Uploaded June 2024 | Updated September 2026, 1 week ago

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Why was the Sun cold and the Earth warm in ancient times?
What evidence indicates that the Earth once was completely ice-covered up to the equator?
Why do we know almost nothing about life on Earth earlier than 500 million years ago?
And what made Darwin doubt his theory of evolution?
Three mysteries of the Earth's history.

Timecode:
00:00 Intro
01:37 The faint young Sun paradox
10:42 Snowball Earth
20:49 Cambrian explosion

RYV Team:
Voice Over: Kent Bleazard