Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
21
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Balsa wood is classified as a hard wood!
41
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
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
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