Today marks the second-ever World Reef Day, an observance created to help focus global attention on the deteriorating health of our planet"s vital reef systems, and also to help marshal efforts to help them recover. Why should we care about the health of ecosystems such as the Great Barrier Reef, seen in this photo? Because reefs are an easy indicator of how healthy our oceans are. And right now, reefs aren"t doing too well. What can we do? Learn about reefs—not just the dangers that put healthy reefs at risk, but why reefs are such a critical part of Earth"s greater ecosystems.
The largest living organism on Earth
Today in History
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A bird of beauty
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An improbable tribute for Towel Day
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Apple Tree Day
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A tower of remembrance
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Earth at Perihelion
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Oh, to sleep under the northern lights
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Dunes at White Sands National Park, New Mexico
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Crimson-rumped toucanet in the Refugio Paz de Las Aves, Ecuador
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Napping away New Year s Day
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‘Ocian in view! O! The joy.’
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Gespensterwald, Nienhagen, Germany
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Best. Holiday. Ever.
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Vale of Edale, Peak District, England
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The birthplace of Cinco de Mayo
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National Hispanic Heritage Month
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Stari Most in Mostar, Bosnia and Herzegovina
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Reflections of the night sky
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Abraham Lake, Alberta, Canada
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April Fools Day
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World Book Day
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Fossil Day
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First Cliff Walk
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Burchells zebras for International Zebra Day
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Whooper swans in Lake Kussharo, Japan
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Poinsettia Day
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Red squirrel
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Are you older than this lake?
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A winter’s holiday ends
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Celebrating Flag Day: ‘O long may it wave’
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A lofty lighthouse and a little ocean spray