A ball of glass will bounce higher than a ball made of rubber.
73
Aluminum used to be more valuable than gold!
84
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
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
Hot water can freeze faster than cold water.
181