How do we know what Earth looked like long before humans appeared? Fossils provide many clues. From dinosaurs to tiny marine organisms, these remnants of the past preserve snapshots of ancient worlds that no longer exist.
Ammonite fossils from the Jurassic Period
Today in History
More Desktop Wallpapers:
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Amber waves of grain
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Chestnut-headed bee-eater, Bardia National Park, Nepal
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South Downs Dark Skies Festival
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Why are blackbirds tied to winter?
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Sunset on the Valley of the Moon
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December solstice
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One rare streak
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Nature at its colourful best
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International Womens Day
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World Donkey Day
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A world within a world
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Blue walls of Chefchaouen, Morocco
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Royal Portuguese Cabinet of Reading, Rio de Janeiro, Brazil
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Lion, Queen Elizabeth National Park, Uganda
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Penguin Awareness Day
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Bavarian Forest National Park, Germany
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Heavenly hot springs
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The staircase of the Fortress of Palamidi, Nafplio, Greece
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Corona Arch near Moab, Utah, United States
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World Penguin Day
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Where fire and water meet
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Swedish wilderness
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Grasmere, Lake District, Cumbria, England
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Wildflower bloom, Central Valley, California, United States
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Wales Millennium Centre, Cardiff, Wales
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Sossusvlei sand dunes, Namib desert, Namibia
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Vinh Hy Bay, Vietnam
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Miravet, Catalonia, Spain
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Big Bend National Park, Texas, United States
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Cosmic cliffs
Bing Wallpaper Gallery

