Hans Krebs was a German biochemist born on August 25, 1900, in Hildesheim, Germany. He is best known for his discovery of the Krebs cycle, a series of chemical reactions that are essential for cellular respiration in living organisms. This cycle plays a crucial role in converting carbohydrates, fats, and proteins into energy. Krebs received the Nobel Prize in Physiology or Medicine in 1953 for his work on the cycle, which has significant implications in biochemistry and medicine. He later moved to the United Kingdom, where he continued his research until his death on November 22, 1981.