A cubic yard of air weighs about 2 pounds at sea level.
31
Hot water can freeze faster than cold water.
181
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
Scientists aren't sure what color dinosaurs were.
312
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Out of all the senses, smell is most closely linked to memory.
146