Glowworms in Blue Mountains National Park, Australia

Petrified Forest National Park, Arizona

US Navy sailors on the WWII museum ship USS Bowfin in Honolulu, Hawaii

An 1840 design for the Analytical Engine by Charles Babbage

The Salzach River in Salzburg, Austria

Mother cheetah and her cub in the Masai Mara National Reserve, Kenya

Autumn leaves coated with frost

Dall sheep rams at Polychrome Pass, Denali National Park, Alaska

Blue icebergs near Cuverville Island, Antarctica

African bush elephants at Masai Mara National Reserve in Kenya

Aerial view of snowy peaks of Vinicunca (aka Rainbow Mountain), Peru

Centennial Bridge towering above Soberanía National Park, Panama

Aerial view of Penn Station and the New York City skyline at night in the 1950s

Zuni Olla Maidens at the annual Inter-Tribal Ceremonial in Gallup, New Mexico

Red squirrels in Cairngorms National Park, Highlands, Scotland

Chocolate Hills in Bohol, Philippines

Cross-section of a fossilized ammonite shell

Irohazaka road near Nikkō, Japan

Forest near the village of Invergarry, Scotland

'A New Breath' by artist Saype in Moléson-sur-Gruyères, Switzerland