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A new theory about our solar system\'s history proposes that there was a fifth giant planet early on that influenced Neptune\'s orbit and was flung out into interstellar space.

Two independent teams have manipulated a piece of viral protein so it can teach immune systems to fight whole groups of viruses, rather than a single strain. This could be the first step towards a universal flu vaccine and could eventually eradicate influenza altogether.

Over the last three years Professor Brian Nosek from the University of Virginia has managed to get a lot of psychologists from around the world to repeat 100 published psychology experiments. In a lot of cases, the new results were considerably different from the original experiment\'s results.

A psychologist in Italy got study participants to stare into each other\'s eyes for ten minutes and describe what they felt. Weird things happened!