A ball of glass will bounce higher than a ball made of rubber.
73
Indoor pollution is 10 times more toxic than outdoor pollution.
62
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
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
Nylon is made from coal and petroleum.
42
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
One ragweed plant can release as many as one billion grains of pollen!
51
No matter how cold it gets, gasoline will not freeze.
107