Mysterious Explosion Detected In The Distant Past, Halfway Back To Big BangNobody knows how the short gamma-ray burst GRB 070714B was triggered, but a leading possibility is the in-spiral and merger of two neutron stars, depicted in this artist rendition. (Credit: NASA/Dana Berry) ScienceDaily (Jan. 9, 2008) — Using the powerful one-two combo of NASA’s Swift satellite and the Gemini Observatory, astronomers have detected a mysterious type of cosmic explosion farther back in time than ever before. The explosion, known as a short gamma-ray burst (GRB), took place 7.4 billion years ago, more than halfway back to the Big Bang....