Humans
Middle age: A triumph of human evolution
Far from being over the hill, people in their fifth and sixth decades are skilled, experienced super-providers – and essential to our species's success, finds David Bainbridge
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Far from being over the hill, people in their fifth and sixth decades are skilled, experienced super-providers – and essential to our species's success, finds David Bainbridge
A drug approved for use in humans reverses Alzheimer's disease in mice, but may not have such dramatic effects in people with the condition