Forget me not

 作者:却酡释     |      日期:2019-03-06 09:04:13
By Philip Cohen IT’S hard to believe we could fail to recognise people with whom we’ve been intimate. Yet geneticists in the US have created socially inept rodents with just that failing. They provide the clearest picture yet of how a molecule popularly known as the “love hormone” shapes relationships in mammals. In animals as different as mice, voles, monkeys and humans, the hormone oxytocin is released from the brain when relationships are being forged, such as during mating or maternal nurturing. But just what oxytocin does has been difficult to work out. When injected into an animal, for example,