A ball of glass will bounce higher than a ball made of rubber.
73
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
Sound at the right vibration can bore holes through a solid object.
134
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21
Aluminum used to be more valuable than gold!
84
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65