If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
A cesium atom in an atomic clock beats over nine billion times a second.
43
One cubic foot of gold weighs more than 1,200 pounds!
78
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
A ball of glass will bounce higher than a ball made of rubber.
73