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Hygiene and Health

20 Mar 2017

We’ve grown up with the idea that dirt is bad. If you drop food on the floor, don’t dare to pick it up and eat it. Sanitize your kitchen and bathroom with “germ killers.” Filter your water. Purify...

Why do we kiss?

22 Feb 2017

What makes us exchange saliva, sebum, bits of food and millions of bacteria with each other? In other words, why do we kiss? This is not an innate activity. South Pacific islanders, for example,...

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