In zero gravity, a candle's flame is round and blue.
16
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
Nylon is made from coal and petroleum.
42
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
One ragweed plant can release as many as one billion grains of pollen!
51
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75