Scientists just invented microscopic knives capable of stabbing and killing bacteria on contact. The germ theory of disease emerged over the last several centuries to explain the way microscopic ...

That is one big bacterium! Researchers have discovered a bacterium visible to the naked eye, challenging prevailing notions about the size of bacteria, most of which only can be seen when using a ...

There are many different ways germs can enter the body. Sometimes, they find a way in through an opening like the mouth, nose, eyes or a cut in the skin. Most of these germs – what scientists call ...