You are what, and where, you drink

sea-maid submitted, created time 6 months 1 day (www.economist.com)

POLICE now have a new test to help catch criminals and verify alibis. By analysing the chemical composition of human hair, researchers can determine the source of the water someone has been drinking in recent months. And that can indicate where he or she has been.

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Your history is printed in your hair

Hair From a Cut

freeman submitted, created time 1 year 7 months (sciencenow.sciencemag.org)

Desperate bald people shouldn't try this at home, but researchers have found that mice will regrow hair, not just skin, after a flesh wound. The discovery dashes the dogma that adult mammals cannot produce new hair follicles, and it suggests ways of improving skin grafts and reversing hair loss.

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