Boris Porshnev was a Soviet anthropologist known for his extensive research on Neanderthals and the origins of hominids.
Dian Fossey was an American zoologist and primatologist who dedicated her life to studying and protecting mountain gorillas in Rwanda, becoming a leading advocate for their conservation.
Niko Tinbergen was a Dutch biologist and ornithologist, known for his pioneering work in animal behavior and ethology, earning him a Nobel Prize in Physiology or Medicine.
Salim Ali was an Indian ornithologist and naturalist who pioneered bird study and conservation in India, earning him the title "Birdman of India".
William Beebe was a pioneering American naturalist, ornithologist, and marine biologist who explored and documented the wonders of the natural world.