Scientists find blood molecule that attracts wolves, repels humans


PARIS: The faintest whiff of a molecule from mammal blood known as E2D sends some animals into a predatory frenzy but frightens others — including people — into retreat, scientists have discovered.
Never before has the same molecule been known to provoke diametrically opposite behaviors in creatures ranging from horse flies to humans, hinting at deep evolutionary roots, they reported in the journal Scientific Reports.

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