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By Michael Le Page. We already know the naked mole rat is an animal superhero: it is long-lived for an animal of its size, rarely gets cancer and shrugs off some kinds of pain. Now the East African rodent turns out to have a metabolic trick that allows it to survive very low oxygen levels with no apparent ill effects. To investigate how well naked mole rats Heterocephalus glaber tolerate low oxygen concentrations, a team of biologists first put them in a chamber with just 5 per cent oxygen, less than a quarter the amount found in air.
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