Without germs, we're nothing Science Nikki Tundel · St. Paul, Minn. · Apr 4, 2007 Listen Story audio Bring on the bacteria Dennis Kunkel Bacteria outnumber us a trillion to one. So it's a good thing most of them are friendly. Gerald Callahan, the author of Infection: The Uninvited Universe, talks about why we need bacteria to survive.
Nikki Tundel