Eiseley is best known for the poetic essay style called the “hidden essay”. He used this to explain complex scientific ideas, such as human evolution, to the general public. He is also known for his writings about humanity’s relationship with the natural world. These helped inspire the environmental movement.
Eiseley’s first book, The Immense Journey: An Imaginative Naturalist Explores the Mysteries of Man and Nature (1946), a collection of writings about the history of humanity, established him as a writer with the unique ability to combine science and humanism. In the essay from it entitled “The Snout”, he wrote:
The door to the past is a strange door. It swings open and things pass through it, but they pass in one direction only. No man can return across that threshold, though he can look down still and see the green light waver in the water weeds.
Eiseley’s book, Darwin’s Century (1958), focuses on the development of the theory of evolution and was awarded the Phi Beta Kappa Science prize in 1959. His other books include The Unexpected Universe (1969), The Night Country (1971), the memoir All The Strange Hours: The Excavation of a Life (1975), and Darwin and the Mysterious Mr. X: New Light on the Evolutionists (1979).
When Loren Eiseley was 3 his father held him up to watch Halley’s Comet blaze across the sky and told his son to look for its return in 75 years. But Loren Eiseley did not live that long. He died July 9, 1977, having used his brief seventy years to leave behind a heritage that continues to enrich the lives of all who come to know his work.