Out of all the senses, smell is most closely linked to memory.
146
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
The average home creates more pollution than does the average car.
33
One ragweed plant can release as many as one billion grains of pollen!
51
Iron weighs more after it rusts.
68