Brass doorknobs automatically disinfect themselves in about 8 hours.
18
A cubic yard of air weighs about 2 pounds at sea level.
31
4.5 pounds of sunlight strike the Earth each day.
27
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6