Who died in February 2020

American mathematician whose critical calculations for NASA enabled the success of early U.S. crewed spaceflights and helped pioneer the use of computers in aerospace

Chinese ophthalmologist known for warning about the coronavirus in December 2019

American actor and filmmaker known for his explosive acting style and starring in over 90 films, including iconic dramas, westerns, and war films

American biochemist who shared the Nobel Prize for discovering nerve growth factor and epidermal growth factor

Kenyan politician who served as the second president of Kenya for 24 years, making him the country's longest-serving president