Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Cold water weighs more than hot water.
93
Rafflesia Arnoldii is the largest flower in the world and can grow as big as an umbrella.
42
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
Aluminum used to be more valuable than gold!
84
One ragweed plant can release as many as one billion grains of pollen!
51
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9