Although most us think of cockroaches as vermin, they do have a useful ecological role.
Our bodies are full of bacteria. Believe it or not, that's not necessarily a bad thing. Learn more on this Moment of Science.
Since botulism bacteria cannot survive in oxygen, they form spores that lie dormant until they’re in an oxygen-free environment. For example, the oxygen-free insides of canned goods are prime breeding grounds for botulism.