When cats are happy, they may squeeze their eyes shut.
10
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
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One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
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.
9
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57