Albert A. Ackerman

American scientist

American naturalist, writer and explorer

American glaciologist, topographer, cartographer, hydrographer, geologist, geographer, and ethnologist

Anglo-Irish explorer

American politician, 26th President of the United States

Austrian writer

American naturalist

American naturalist

American writer

American geologist and botanist

American physicist and mountaineer

American explorer and writer

American ethnographer and explorer

American astronomer

U.S. botanist

Botanist

Prospector, miner, mine broker, author, explorer of the Thomas Range, and mineral dealer of Salt Lake City, Utah, USA

American historian, photographer and activist

American sports journalist