Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Cows can sleep standing up, but they can only dream lying down.
745
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
There are so many kinds of apples that if you ate a new one everyday, it would take over 20 years to try them all.
34
Your body is creating and killing about 2.4 million red blood cells per second.
17