Biologists are quietly rewriting what it means to be alive, and the human body has become one of their strangest frontiers.

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All species on Earth, both living and extinct, are related. We know this because of a biological tool called the tree of life. This "tree" takes the form of a diagram that maps the relationships ...

A tree of life based on genes from across the nuclear genome and containing nearly 60% of all angiosperm genera unveils the complex evolutionary history of flowering plants. This tree both ...