They have the luxury of being able to sleep as long (as) they want (and) need each day,” she said. “Animals that are long-lived like humans and elephants don’t have this pressure to reproduce in a short period of time. “Animals need to reproduce to pass on their genes, but they also need to sleep to survive,” Erika Zaid, lead author and animal behavior researcher at La Trobe University in Melbourne, told CNN. The study, published Thursday in the journal Current Biology, is the first to show direct evidence for this type of “extreme” sleep restriction in any land-dwelling mammal, according to the researchers. Scientists based in Australia have found that mouse-sized male antechinus trade sleep to leave more time for reproductive activities during mating season, with one male who was monitored halving his sleep time during that period. But for a small marsupial in Australia, sex is a higher priority than getting some shut-eye - and it is willing to sacrifice hours of it daily to reach its happy ending. For some, happiness is getting enough sleep.
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