A cubic yard of air weighs about 2 pounds at sea level.
31
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
The average home creates more pollution than does the average car.
33
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
All Humans Are 99.9% Genetically Identical and 98.4% of human genes are the same as the genes of a chimpanzee.
51
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199