At its conference this August, the International Astronomical Union (IAU) will make a decision that could see Pluto lose its status as a planet.
For the first time, the organisation will be officially defining the word "planet", and it is causing much debate in the world of astronomy.
There is only one thing that everyone seems to agree on: there are no longer nine planets in t...
Michael Mosley explores the latest science about how our personalities are created - and whether they can be changed.
Despite appearances, Mosley is a pessimist who constantly frets about the future. He wants to worry less and become more of an optimist.
He tries out two techniques to change this aspect of his personality - with surprising results.
And he travels to the frontie...