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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The migrating monarchs of Michoacán
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Black bear cub emerging into spring
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Shakespeare Day
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Joshua Tree National Park, California
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National Hispanic Heritage Month
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Irohazaka road
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The Monastery of Roussanou, Greece
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Celebrating National Panda Day
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World Migratory Bird Day
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Commemorating the life of a famous railroad conductor
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It s leap day!
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Black Fell in England s Lake District
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Summer winds down in the Southern Hemisphere
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Wind Cave National Park celebrates 120 years
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Gateway to America
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Pumpkin field, Victoria, British Columbia, Canada
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Blue Lagoon spa, Grindavík, Iceland
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Moeraki Boulders, South Island, New Zealand
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Annivesary of the Wilderness Act of 1964
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Lake Pehoé, Torres del Paine National Park, Chile
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Kings of the Kalahari
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Christmas market in Leipzig, Germany
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Sydney Harbour, New South Wales, Australia
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Happy Cinco de Mayo!
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European bee-eater, Sierra de Grazalema Natural Park, Cádiz, Spain
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National Blueberry Day
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Earth Day
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A wild, craggy corner of the United States
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National Take a Hike Day
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It s Independence Day in Mexico
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