'Tree of life' for 2.3 million species released

A first draft of the "tree of life" for the roughly 2.3 million named species of animals, plants, fungi and microbes—from platypuses to puffballs—has been released.

Why Do We Have Fingerprints?

(PhysOrg.com) -- Unlike most wrinkles on our bodies, which appear due to bending and stretching of the skin, fingerprints aren't the result of repeated motion. Each of us is born with a unique set of them, although scientists ...

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