Fracking safe - within limits, says study

The controversial technique for shale gas production known as fracking won't contaminate water sources, say researchers - as long as there's a safe distance between the injection source and water supplies.

Milky Way stars came from elsewhere in cosmic game of pool

Many of the Milky Way's ancient stars derive from other smaller galaxies torn apart by violent galactic collisions, say researchers at Durham University.

Dark matter and dark energy may not exist at all

Everything we know about the composition of the universe may be wrong, according to physicists.