Monday 18 June 2018
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4 months ago

Vampire bat’s blood-only diet ‘a big evolutionary win’

At first glance, the cost-benefit ratio of a blood-only diet suggests that vampire bats -- the only mammals to feed exclusively on the viscous, ruby-red elixir -- flew down an evolutionary blind alley. Blood is not only teeming with bacterial and viral disease, it is also very poor in nutrients -- too few carbs and vitamins, way too much salt. It s a miracle Dracula lived as long as he did. But natural selection, according to a study published Monday, overcame these challenges and fashioned a gene

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