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
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Vanilla flavoring is sometimes made with an ingredient from beaver pee.
82