Space

Crab Nebula emits unexplained superflare

'Wrong way' planetary orbits explained

Huge storms sweep entire galaxies clean

NASA picks project shortlist for next Discovery mission

Moon tourists to get more living space

SpaceShipTwo demonstrates 'feathered' reentry

Gravity probe results confirm theory of relativity

Scientists ready to study Earth-buzzing asteroid

Team creates largest-ever 3D map of early universe

Electric vehicles get tested in Antarctica