News: evolution
Some evolutionary losses may not be lost forever
Nine species of sea snakes have now been identified as having regained the genetic requirements for advanced colour vision, demonstrating that once a complex trait has been lost to evolutionary time, it may be regained in some way.
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Why don’t larger dogs live as long as smaller breeds?
Scientists have for the first time explained why larger dogs have shorter lifespans than smaller dogs - selective breeding for size has made large breeds more susceptible to cancer.
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