At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Rafflesia Arnoldii is the largest flower in the world and can grow as big as an umbrella.
42
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
A ball of glass will bounce higher than a ball made of rubber.
73
A cesium atom in an atomic clock beats over nine billion times a second.
43