Cosmic ‘enlightenment’ dawned slowly

The end of the universe’s dark age – a period before stars and black holes heated up intergalactic gas – was long and drawn out

URL: http://feeds.newscientist.com/c/749/f/10898/s/106b3b18/l/0L0Snewscientist0N0Carticle0Cdn198320Ecosmic0Eenlightenment0Edawned0Eslowly0Bhtml0DDCMP0FOTC0Erss0Gnsref0Fspace/story01.htm