A cubic yard of air weighs about 2 pounds at sea level.
31
Scientists are attempting to create a synthetic brain by reverse-engineering the mammalian brain down to the molecular level. A cellular human brain is predicted possible by 2023. It hopes to shed light on consciousness.
10
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
The smell of freshly cut grass is actually a plant distress call.
31
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
Scientists aren't sure what color dinosaurs were.
312
A single speck of dust is half way in size between a subatomic particle and the Earth.
15