No One Knows What's Causing These Mysterious Radio Bursts From Space

Back in 2007, astronomers detected an incredibly brief, incredibly strong radio wave burst in Australia. And now, on the opposite side of the world, astronomers have detected a second blast of similar proportions. Meaning that A) the first one wasn't a fluke, and B) we have absolutely no idea what's causing them. » 7/28/14 4:08pm 7/28/14 4:08pm