Peering deep into space — an astounding 90% of the way across the observable Universe — two groups of astronomers led by University of Edinburgh’s Dr. Iván Oteo and Tim Miller from Dalhousie and Yale Universities have witnessed the beginnings of gargantuan cosmic pileups: the impending collisions of young, star-forming galaxies. This artist’s impression of SPT2349-56 shows a group of interacting and merging galaxies in the early Universe....
