Nobel Prize For Medicine.
Great story this because it illustrates the best and worst of science. People with ulcers are often stressed. Thus stress > > ulcers. But where is the proof? Well stress can lead to high blood pressure, and patients with high blood pressure often had ulcers. BECAUSE THEY WERE STRESSED DUE TO HAVING STOMACH ULCERS.
The subtext of this discovery is that no-one was really looking for a cause for ulcers. And one wonders how much back-up these researchers got for their work when the lead scientist decided to infect himself with the bacterium to see if he developed an ulcer. He did, but luckily anti-biotics saved the day, and now does with many people with ulcers. Assumptions, destroyed. Cheers!