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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Colosseum, Rome, Italy
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Space is for everyone
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Stepping into autumn
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World Philosophy Day
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Ancient til trees in Fanal Forest, Madeira, Portugal
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Mount Hood, Oregon
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World Giraffe Day
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Vacuum Chamber 5 at Glenn Research Center
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Pi Day
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Barracudas at Shark Reef, Ras Mohammed National Park, Sinai Peninsula, Egypt
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International Surfing Day
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Anza-Borrego Desert State Park, California
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A giant relic in Java
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Great Backyard Bird Count
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International Day for Monuments and Sites
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Womens History Month
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An underwater rainbow
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Celebrating World Olive Tree Day
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Happy World Whale Day!
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Royal Alcázar of Seville, Spain
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Village of Santa Maddalena, Dolomites, Italy
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International Sloth Day
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It s only Wednesday
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Where the glow of the holidays lingers
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Ludwig’s palace
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Death Valley National Park, California
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All Rhodes lead to the beach
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Anniversary of Bryce Canyon National Park
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World Laughter Day—it s a hoot
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Reflecting on one of the world s strangest rivers
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