Bats sleep 18-20 hours per day.
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Penguins have a gland above their eye that turns saltwater into freshwater.
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Jellyfish as a species are actually older than dinosaurs and sharks.
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The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
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In 2011, a male tiger in India adopted a litter of orphaned cubs, taking on the role of ‘mother’. Wildlife officials say such behavior had never been observed before.
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