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Scientists long assumed that new genes appear when evolution tinkers with old ones. It turns out that natural selection is much more creative.
To fight cancer and ageing, biologists are looking at how cells evict, kill or cannibalize less-fit rivals.
When it comes to being willing to explore more efficient options to solving a problem, monkeys exhibit more cognitive flexibility than humans, according to a new study.
Diurnalism is by far the exception rather the rule in mammals. About 250-230 million years ago, the mammalian ancestors, called the therapsids, became exclusively nocturnal, and stayed so until the demise of the dinosaurs 66 million years ago.
