Your brain is 80% water.
525
Sound travels about 4 times faster in water than in air.
408
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Scientists in Germany have developed a candy that doesn't cause cavities.
11
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Sound at the right vibration can bore holes through a solid object.
134