Richard Nixon | Richard Wagner | Richard Strauss | Richard Branson | Cliff Richard | Richard Gere | Richard Burton | Richard Hammond | Richard | Richard Dawkins | Little Richard | Richard Feynman | Richard Attenborough | Richard M. Daley | Richard I of England | Richard Thompson | Richard Francis Burton | Richard Thompson (musician) | Richard Pryor | Richard Linklater | Richard III of England | Richard Petty | Richard II | Richard II of England | Richard E. Byrd | Maurice Richard Arena | Muhal Richard Abrams | Richard Herring | Richard Wright | Richard Stallman |
He studied botany and zoology at the University of Jena under Christian Ernst Stahl (1848–1919) and Ernst Haeckel (1834–1919), and continued his studies at the University of Munich under Ludwig Radlkofer (1829–1927) and Richard Hertwig (1850–1937).