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Humans

Vision gets better with the right mind-set

Volunteers’ eyesight improved when they believed that they could see particularly well.

Health & Medicine

Body makes its own morphine

A study in mice suggests other mammals, including humans, can produce the painkiller in their bodies.

Animals

Chimps may be aware of others’ deaths

Reactions of chimps to dead companions and infants suggest a basic realization of what death entails.