A geologist warns that hundreds of potentially catastrophic comets remain to be discovered.

Researchers have made two breakthroughs in nanotechnology by getting tiny nanoparticles to form structures.

The first space satellites to fly in formation are ready to investigate the violent space weather which can threaten satellites, astronauts and even power grids on the Earth's surface.

Fears that genetic testing will create a new underclass of uninsurable people are unfounded, according to an expert in the field.