Scientists in Germany have developed a candy that doesn't cause cavities.
11
Cold water weighs more than hot water.
93
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Research indicates that plants grow healthier when they are stroked.
173
Sound travels about 4 times faster in water than in air.
408
Iron weighs more after it rusts.
68