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Coral Bleaching Coral bleaching is the whitening of coral colonies due to the loss of symbiotic zooxanthellae from the tissues of polyps. This loss exposes the white calcium carbonate skeletons of the coral colony. Corals naturally lose less than 0.1%...

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Why is the Sky Blue? If you were to travel 20 miles or so above the Earth's surface, the sky would appear black. What happens during light's descent to Earth that makes the sky take on a wonderful azure hue? "White" sunlight passes through our atmosphere,...

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Fact or Fiction? A big diference Climate fluctuates naturally between warm and cold periods. but the 20th and 21th century has seen the greatest warming in at least a thousand years, and natural forces can't account for it all. The rise in co2s and other...

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L'eau (H2O, HOH) est la molécule la plus abondante à la surface de la Terre, composant 70-75% de la surface de la Terre à l'état liquide et solide en plus de la trouver dans l'atmosphère sous forme de vapeur. Elle est en équilibre dynamique entre l'état...

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