According to studies, men change their minds two to three times more often than women.
72
The bark of an older redwood tree is fireproof.
65
Iron weighs more after it rusts.
16
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
Sound travels fifteen times faster through steel than through air.
134
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
Nearly 50% of the world's scientists are assigned to military projects.
71