Today is Asteroid Day, and it"s a reminder that as our planet follows its path around the sun, it encounters a lot of stuff. Science tells us that every day, Earth"s atmosphere is hit with roughly 100 tons of dust and particles the size of a grain of sand. And every year, at least 30 small asteroids enter the atmosphere, only to burn up before touching the ground. NASA says it"s pretty much guaranteed that at least one of them will be about the size of a car. As time progresses, the likelihood increases that even larger celestial rocks will hit the ground and cause significant damage.
Asteroid Day
Today in History
More Desktop Wallpapers:
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Cheetah mother and cub
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An historic forest
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Celebrating Native American Heritage Day
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Ingenuity in action on the Santa Monica Pier
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Tour de France begins
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Camels at Jaisalmer, Rajasthan, India
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Death Valley National Parks Anniversary
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Arches National Park anniversary
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Mount Hamilton, near San Jose, California
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Happy Holi!
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Jöriseen lakes in the Silvretta Alps, Switzerland
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Superbloom in Carrizo Plain National Monument, California
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Harbin International Ice and Snow Sculpture Festival, China
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Vote!
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San Francisco Bay salt flats
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Monarch butterflies in Angangueo, Mexico
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Happy Panda Day!
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2022 Winter Paralympics
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Dreaming of the Tyrrhenian Sea
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The Guggenheim turns 60
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Plate ice along Lake Superior, Grand Marais, Minnesota
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Celebrating 200 years of statehood
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Happy Thanksgiving!
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A Bengal tiger in Ranthambore National Park, India
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Irohazaka Road in fall, Nikko, Tochigi, Japan
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Languid life on the Lakes
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Happy Boxing Day!
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Ljubljana, Slovenia
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National Bison Day
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Happy trees = Clean air
Bing Wallpaper Gallery

