Sleep mode
Astronauts could be put into hibernation to travel to Mars
Sometimes it is confused with sleep because when an animal is hibernating it looks like it is sleeping, but it’s a fundamentally different state
Tsvetan The Bear is not Feeling Sleepy
The bear Tsvetan, who has been in the wild for several days, can not fall asleep for the winter. The 200-pound animal was captured and tagged with a tracking collar, and was recently re-released to the Central Balkan National Park, reports frognews.
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