While sea level rises caused by global warming threaten islands, a tiny marine creature appears to be riding to the rescue, spreading rapidly through the oceans and stabilizing coastlines.
German scientists say they've found a way to tell whether or not our universe is a giant computer simulation - and that there's evidence to suggest that it is.
Since the 2010 discovery of four stars 300 times as massive as our sun, astronomers have been scratching their heads over how they could have come to exist.
The theory of dark matter has taken another knock, with the discovery of a vast structure of satellite galaxies and clusters of stars surrounding our galaxy, stretching out across a million light years.
