Some 600 Million Years Ago, A Bizarre Group Of Creatures Arose. They Had No Heads, No Tails, No Eyes Or Mouths. They Looked Like Nothing Else That Has Since Lived On Earth. They Were Long Thought To Have Been An Evolutionary Dead End. They May Have Been Our Ancestors. If the history of life were a movie, you would never watch it all the way through. Soon after the opening credits you'd either fall deeply asleep or storm out in boredom. The film begins promisingly enough: it's 4.5 billion years ago, and Earth, along with the rest of the solar system, is accreting from cosmic debris; a period of asteroid bombardment ensues- great FX!- before the first cells make their appearance amidst the primordial ooze. But then the action dries up as the film laboriously documents more than 3 billion years of nonevents. Some cells form colonies. Others get nuclei. Hot ocean vents draw a crowd.
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