Out of all the senses, smell is most closely linked to memory.
146
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15
Iron weighs more after it rusts.
16
Indoor pollution is 10 times more toxic than outdoor pollution.
62
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
A ball of glass will bounce higher than a ball made of rubber.
73