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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Black grouses lekking
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In celebration of America’s national bird
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A little blue
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Let s ride! It s Roller Coaster Day
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Collared aracari in Costa Rica
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Medieval towers in Mestia, Upper Svaneti, Georgia
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Þorrablót, Icelandic midwinter festival
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Mute swan
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Its Halfway Day!
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Cherry blossoms at the National Mall, Washington, DC
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A notorious gunfight that was incorrectly named
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Bluebells in Hertfordshire, England
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Carl Sagan Day
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Mod gear
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Día de los Muertos celebrations in Mexico
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Berlin Festival of Lights
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20 years later
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International Tiger Day
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Darwin Day
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Overlooking the Douro
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Oxbow Bend on the Snake River, Grand Teton National Park, Wyoming
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Trevi in bloom
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A festival of colors
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Ancient til trees in Fanal Forest, Madeira, Portugal
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Of moose and Maine
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Lunar eclipse
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On this shore, history was made
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Celebrating a young girl s age-old discovery
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Young black caiman, Tambopata National Reserve, Peru
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Midnight sun
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