There are more nerve cells in the human brain than there are stars in the Milky Way.
349
Tsunamis ( tidal waves ) travel as fast as jet planes.
97
If you have 1 billion dollars and spend $1,000 every day, it would take you 2,740 years to go broke.
31
No matter its size or thickness, no piece of paper can be folded in half more than 8 times.
-64
Passengers on the Beijing subway can pay with plastic bottles.
29
At 90 degrees below zero, your breath will freeze in mid-air and fall to the ground.
25
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
The mile is Latin for 1,000. The number of paces it took the average Roman!
36