Living organisms share an ancestor called the last universal common ancestor, or LUCA. LUCA is estimated to have lived approximately four billion years ago. All plants, animals, and microbes can trace ...
About 800 million years ago (mya), before the supercontinent Pangea formed, the Earth was more diverse than classical theory suggests. By reconstructing the tree of life from the evolutionary history ...
Imagine the tree of life. The tip of every branch represents one species, whether you're talking about humans, E. coli, tardigrades, baker's yeast or giant kelp. If you follow any two branches back ...
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