PBS Eons has an episode on this:
When the Earth Was Purple https://m.youtube.com/watch?v=IIA-k_bBcL0
(This is great science channel. PBS should have continued to receive federal funding.)
When the Earth Was Purple https://m.youtube.com/watch?v=IIA-k_bBcL0
(This is great science channel. PBS should have continued to receive federal funding.)
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