Star Trek is packed with all sorts of alien, both on the Enterprise and throughout the final frontier, and these are the strongest alien races of them all.

A new study suggests alien life may be easier to detect through clusters of similar planets rather than single biosignatures.

Space scientists look back on 30 years of exoplanet discoveries — from rows of massive ‘super-Earths‘ to worlds with perfectly synchronized orbits. It was also the start of a whirlwind of discovery.