"Tu Youyou had been interested in science and medicine since she was a child, so when malaria started infecting people all over the world in 1969, she went to work finding a treatment. Trained as a medical researcher in college and healed by traditional medicine techniques when she was young, Tu Youyou started experimenting with natural Chinese remedies. The treatment she discovered through years of research and experimentation is still used all over the world today." -- publisher
2,000 years ago in China, a curious boy named Cao Chong solves the problem of how to weigh an elephant when the prime minister's most trusted and knowledgeable advisors are stumped. Includes activities.