Faster than light

Faster-than-light “warp drives” may be theoretically possible, but they usually involve exotic physics well out of our reach. Now an astrophysicist has outlined a hypothetical design that could allow FTL travel using conventional physics.

Wormholes are a sci-fi staple – but could they be science fact? Surprisingly they fit into current physics models, although no evidence has ever been found. Now, researchers have outlined how we might go about looking for wormholes in our own galaxy.

It's often a case of swings and roundabouts. If you save money by buying a house out of town, you spend more time and money commuting. According to a new analysis, the better an object is hidden by an invisibility cloak at one color of light, the easier it is to see at other colors.

Quantum theory includes a "spooky action at a distance", which is now known to travel at a speed at least 10,000 times faster than light.