Articles on Human biology

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Most people get acquainted with their appendix when it’s inflamed and about to rupture. Sebastian Kaulitzki/Science Photo Library via Getty Images

What does the appendix do? Biologists explain the complicated evolution of this inconvenient organ

The appendix has independently evolved at least 32 times across 361 mammalian species. What makes it an evolutionary darling when it’s more of a medical liability today?
Love and affection are as important as food, water and shelter. jamesgoodmanphotography/flickr

Can a lack of love be deadly?

Children raised in orphanages often lack a key ingredient for healthy development – love.

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