One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Your brain is 80% water.
525
According to studies, men change their minds two to three times more often than women.
72
Sound travels fifteen times faster through steel than through air.
134
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
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