Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
In zero gravity, a candle's flame is round and blue.
16
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
One 75-watt bulb gives more light than three 25-watt bulbs.
57
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17