Final Kiss of Two Stars Heading for Catastrophe (ESO press release)

An international team of scientists using the ESO's Very Large Telescope have found the most massive and hottest overcontact binary known so far. This remarkable system located in our neighbouring galaxy, Large Magellanic Cloud, 160 thousand light-years away, has a fascinating future. This binary can either merge in a massive, rapid rotator and maybe magnetic single star and explode in one of the most energetic event known in the Universe, the long-duration gamma-ray bursts, or, if the merger is avoided, explode in two supernovae creating a close black hole binary which is a strong source of gravitational waves. (http://www.eso.org/public/usa/news/eso1540/)

Almeida, Sana & de Mink et al. 2015, ApJ, 812, 102