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
Aluminum used to be more valuable than gold!
84
The average home creates more pollution than does the average car.
33
Sound travels about 4 times faster in water than in air.
408
A cubic yard of air weighs about 2 pounds at sea level.
31
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
There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
13
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108