Discovery of tiniest organism could have huge implications Houston Chronicle

They’ve deciphered DNA and cloned all manner of animals, but one question still nags biologists working on the frontiers of life.
Just how small can a creature be and still be considered living?
The answer could provide more than fodder for academic debate. A better grasp of the very smallest life forms could help doctors clear clogged arteries and dissolve kidney stones with antibiotics, or even end the argument over whether life once existed on Mars.