These are the men who visited what Albert Einstein called a “palace of science” — a lab where the greatest scientists from around the world came to work and exchange ideas.
Naturalist and explorer George Cherrie kept a meticulous diary of the journey down an uncharted river in the Brazilian Amazon, which he took with Theodore Roosevelt in 1914.
Theodore Roosevelt's great-grandson discusses the president's love of Lincoln, penchant for Hungarian poetry, and the book that inspired his conservation legacy.
The iconic entertainer delivered his unique brand of humor to troops around the globe and into the living rooms of millions of Americans. Read a conversation with his biographer.