 |   At any given time you have about a billion bacteria on every tooth in your mouth. ANSWER |
  Some scientists believe that, long ago, certain supertough bacteria may have hitched rides to Earth on meteorites. ANSWER |
  Swamps produce terrible odors because owls shower them with nasty-smelling antibacterial sprays. ANSWER |
  There are millions of species of bacteria that can make people ill. ANSWER |  |
  People use bacteria to clean up after oil spills. ANSWER |
 |   Bacteria dont often reproduce. ANSWER |
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