Violent supernovae 'triggered at least two Earth extinctions,' study suggests
At least two mass extinction events in Earth's history were likely caused by the "devastating" effects of nearby supernova ...
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ABG Preview: NOVA Earth Day Special - The Car of the Future
Tuesday night the PBS science program NOVA will feature an Earth Day look at "the Car of the Future." WGBH, the Boston PBS station that produces NOVA sent us an advance copy of the show to take a ...