Feb 20

How massive sloshing stars make fiery supernovas

Scientists believe they have finally captured what happens in the heart of a star before it explodes in a supernova. With the help of NASA’s Nuclear Spectroscopic Telescope Array (NuSTAR), scientists mapped how shockwaves rip apart dying stars. Their…

Apr 02

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James Hansen Steps Down from NASA

// Revisit NewsHour's interview with retiring NASA climate scientist James Hansen, who discussed why summer droughts in the summer of 2012 were linked to climate change. James Hansen, an outspoken advocate for action on climate change, announced Monday that he…