Who famously solved the Poincaré conjecture?

Grigori Perelman

What legendary creature in Greek mythology had the body of a lion, head of a goat, and tail of a serpent? What Babylonian king threw Daniel’s three friends into a furnace? Which Marvel Cinematic Universe character uses vibranium wings? What is the name for an illegal hockey move involving lifting the stick above shoulder height? What kind of weapon is a katana?