Out of all the senses, smell is most closely linked to memory.
146
Scientists are now able to grow 'beating' heart tissue in a lab!
162
One ragweed plant can release as many as one billion grains of pollen!
51
Indoor pollution is 10 times more toxic than outdoor pollution.
62
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Iron weighs more after it rusts.
16