From Wikipedia: ---Quote--- The sources of most GRBs are billions of light years away from Earth, implying that the explosions are both extremely energetic (a typical burst releases as much energy in a few seconds as the Sun will in its entire 10 billion year lifetime) and extremely rare (a few per galaxy per million years[1]). ---End Quote--- This makes me wonder if GRB's might be the product of a much younger set of conditions in our universe. Can anyone point me to studies that address this possibility? Luckmeister