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Photochrom print of the Sutro Baths in San Francisco from ca. 1900

Photochrom print of the Sutro Baths in San Francisco from ca. 1900 published as a postcard by the Detroit Publishing Company. The process involved creating a coloured image using a black and white photographic negative

© Universal Images Group Ltd/AUSCAPE All rights reserved

American, Bay, Coast, Fotochrom, High Angle View, Historic, Illustration, Lithograph, Photochrome, San Francisco, Seaside, Streetscape, Town, Uig, United States, Universal Images Group, Usa, Vintage

The mushroom cloud formed from the first hydrogen bomb explosion, code named Ivy Mike

The mushroom cloud formed from the first hydrogen bomb explosion, code named Ivy Mike, which destroyed the island of Elugelab in the Enewetak atoll. The United States tested 67 nuclear weapons during the period of the Cold War including Castle Bravo which was the largest nuclear test ever conducted. Marshall Islands, Micronesia

© Universal Images Group Ltd/AUSCAPE All rights reserved

Footprint of a three-toed dinosaur, 130 million years old

Footprint of a three-toed dinosaur, 130 million years old visible at low tide; plaster cast replicas have been placed at the top of the cliff above. Gantheaume Point, Broome, Western Australia

© Steven David Miller/AUSCAPE All rights reserved

Australian, Dinosaurs, Fossilised, Fossils, Geological, Geology, Kimberley Region, Megalosaur, Megalosurus, Paleontology, Traces, Tracks, Tridactyl