Indoor pollution is 10 times more toxic than outdoor pollution.
62
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Nearly 50% of the world's scientists are assigned to military projects.
71
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Your brain is 80% water.
525