Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
The average person in their lifetime will spend an estimated 20,160 minutes kissing!
212
The 409 escalators in the London subway cover a distance every week which is approximately equivalent to several trips around the globe!
94
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
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
Your thumb is about the same size as your nose.
124