One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Alligators can live up to 100 years.
337
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
Alligator snapping turtles can live for over 150 years. Scientists know this because some of the turtles had musket balls in their stomachs.
271
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10