Professors James Crawford and Alan Boyle said that an independent Scotland would have to renegotiate its relationship with international bodies.

BBC: Scotland politics

Science editor Alan Boyle's blog: A video that shows a bright orb exploding in the sky sparked a UFO mystery in Sacramento, Calif.

MSN: Surprisingly, giant asteroid Vesta covered in hydrogen

Science editor Alan Boyle's blog: NASA's top expert on near-Earth objects says that new telescope systems are gradually getting a handle on potentially threatening asteroids.

MSN: Big sunspot unleashes an intense solar flare