Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Nylon is made from coal and petroleum.
42
Pure water (H2O) does not conduct electricity on its own.
46
Indoor pollution is 10 times more toxic than outdoor pollution.
62
Sound travels fifteen times faster through steel than through air.
134
Your brain is 80% water.
525
Scientists are now able to grow 'beating' heart tissue in a lab!
162