Thomas Kuhn was among the leading figures in the philosophy of science during the 20th century (along with other greats such as Karl Popper and Ludwig Wittgenstein). He popularized the use of the word paradigm,
This blood smear shows human blood positive for malaria infection, with a Plasmodium falciparum gametocyte (the sexual form of the most lethal of the malaria parasite species) right in the center.