Iron can be used by our body for good or bad, depending on which cells get a hold of it.
Small doses disinfect, but large chlorine quantities are deadly to humans.
Could the frigid waters of Jupiter's moon Europa host alien life?
Doctors have been having remarkable success with a rather unconventional type of treatment: fecal transplantation.
How can dogs eat anything from homework to food wrappers and still be ok?
Check any package of bacon, hotdogs, or cold cuts and chances are you'll find nitrites listed among the ingredients.
During the middle ages the invention of gunpowder had the unlikely result of providing a new way of preserving meat.
The antibiotics help those microorganisms survive by attacking other bacteria competing for the same food supply... but how do they protect themselves?
Theories about invisible particles causing disease go back almost 2,000 years, but it wasn't until the late 1600's that scientists finally saw microorganisms.
You've probably seen things decay before. How does the process work?