Barry Marshall
The Australian doctor who drank a beaker of bacteria, then won a Nobel for tying ulcers to an infection.
Mentioned in
In praise of asking, part two
Why should a simple question cost so much? A nine-year-old tested a healing method with a towel and a piece of cardboard, a doctor drank a glass of bacteria, and Socrates drank the hemlock; each price depended on the certainty the question shook.