ALBAWABA - An astrophysicist has proposed that devastating gamma-ray bursts killed alien civilizations. While life beyond Earth has long been postulated, this idea gives insight on a possible cataclysmic catastrophe that eliminated extraterrestrial life forms. An expert suggests that gamma-ray bursts from faraway planets may have destroyed alien civilizations. The demise of large stars causes bursts that release radiation that may wipe out whole civilizations. According to the British tabloid ...