Dr Andrew Levan from the University of Warwick says these longer gamma-ray bursts are actually caused by really, really big stars going supernova.

BBC: NASA's Swift satellite observes massive supernova stars

Demetradze and Levan Kobiashvili, the Schalke 04 midfielder, were becoming increasingly influential as the Scots struggled to retain possession.

BBC: SPORT | Football | Internationals | Scotland 2-1 Georgia

Dr Levan presented his paper at the GRB 2013 Symposium in Nashville, Tennessee.

BBC: NASA's Swift satellite observes massive supernova stars