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Key thinkers across history — grouped by era, colour-coded by discipline. Click any card to explore ideas, quotations, and classroom contexts.

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Modern — 1800 to 1950
Tu Youyou 1930-present · China
Tu Youyou is a Chinese medical scientist. In 2015 she won the Nobel Prize in Physiology or Medicine for discovering artemisinin, a malaria drug that has saved millions of lives. She was born on 30 December 1930 in Ningbo, a city on China's east coast. Her family valued education. As a teenager, Tu caught tuberculosis and had to take two years off school. The experience pushed her toward medicine. When she returned to school, she knew she wanted to help fight disease. She studied at Beijing Medical College and graduated in 1955. She then joined the Institute of Materia Medica at the Academy of Traditional Chinese Medicine. From 1959 to 1962 she took a special course that taught modern-trained scientists about traditional Chinese medicine. This combination shaped the rest of her career. In 1969, at age 39, she was put in charge of a research team on a secret Chinese government project called Project 523. The goal was to find a new malaria treatment. Over the next few years, Tu and her team worked through thousands of traditional herbal remedies. She found her answer in a 1,600-year-old Chinese medical book. The compound she isolated, now called artemisinin, became one of the most important drugs of the twenty-first century. She did this work without a PhD, without any study abroad, and without membership in the Chinese Academy of Sciences. Some Chinese call her the 'three-nos professor'. She was promoted to senior researcher in 1980. She is still active at the China Academy of Chinese Medical Sciences.
"A bunch of qinghao; soak in two sheng of water; wring out the juice and drink it all."