Out of all the senses, smell is most closely linked to memory.
146
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Most dust particles in your house come from dead skin.
48
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
Sound travels about 4 times faster in water than in air.
408
If the chemical sodium is dropped into water it will immediately and violently explode.
67
One ragweed plant can release as many as one billion grains of pollen!
51