A Geo-chemical History of Life on Earth is a Documentary programme.  Next Show TimesSeasons in Detail
A Geo-chemical History of Life on Earth: When Bacteria Ruled the WorldSeries 1, episode 2Justin Rowlatt explores the Pre-Cambrian - a kind of dark ages spanning most of Earth's history, but about which very few fossil records exist. What is known is that it contained two of the most important developments in evolution - one gave a breathable atmosphere and the other made possible all the animals that now breathe it Cast (unconfirmed)
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