A cubic yard of air weighs about 2 pounds at sea level.
31
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
Sound travels fifteen times faster through steel than through air.
134
One cubic foot of gold weighs more than 1,200 pounds!
78
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15