Astronomers publish a detailed map of where dense, very cold gas - the stuff of which new stars are made - is found across the Milky Way.

The operator of the Fukushima nuclear power plant hit by the 2011 tsunami admits it should have announced a nuclear meltdown at the site sooner.

Astronomers pinpoint the source of an explosive 'fast radio burst' for the very first time, and use it to measure the density of the cosmos.