Jim Baggott

Evidence for simple, single-celled life can be found in fossils dating back about 3.5 billion years. These are bacteria and archaea, two prokaryote life forms that differ in their genes and cell membranes. We have to wait another billion years or so before we see complex eukaryote cells, of the kind that makes up larger life forms (including us). Why?

This is the ninth in a series of posts on the Oxford University Press TUMBLR site.

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