Mars had an oxygen-rich atmosphere around 4 billion years ago
13
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
The average person in their lifetime will spend an estimated 20,160 minutes kissing!
212
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Lurch, a Watusi bull, had the largest horns in the world.
32
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82