Indoor pollution is 10 times more toxic than outdoor pollution.
62
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
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
Pure water (H2O) does not conduct electricity on its own.
46
Sound at the right vibration can bore holes through a solid object.
134
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
One ragweed plant can release as many as one billion grains of pollen!
51