A cubic yard of air weighs about 2 pounds at sea level.
31
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
21
4.5 pounds of sunlight strike the Earth each day.
27
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101