Scientists are now able to grow 'beating' heart tissue in a lab!
162
Iron weighs more after it rusts.
68
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
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
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
A cubic yard of air weighs about 2 pounds at sea level.
31
