Jumping Sundogs Over Thunderclouds

Submitted URL: : Explanation: What’s happening above those clouds? In the past few years, videos have appeared on the web detailing an unusual but little known phenomenon: rapid light changes over clouds. Upon inspection and contemplation, a leading hypothesis for its cause has now emerged. In sum, this hypothesis holds that a lightning discharge […]

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Ivanhoe Reservoir, Los Angeles

Submitted URL: : In 2007, high levels of bromate—a carcinogen formed when bromide and chlorine react with sunlight—were found in Los Angeles’s Ivanhoe Reservoir. Today three million black plastic balls help deflect UV rays.

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