Summary:
- The article discusses the groundbreaking research of Barry Marshall and Robin Warren, who identified *Helicobacter pylori* as the primary cause of peptic ulcer disease.
- It highlights the historical significance of their 2005 Nobel Prize in Physiology or Medicine, which overturned the long-held medical consensus that stress and lifestyle were the sole drivers of ulcers.
- The piece emphasizes the importance of empirical scientific methodology, particularly Marshall’s self-experimentation to prove the bacteria's role in gastric inflammation.