Just over 40 years ago, in his novel Contact, astronomer Carl Sagan imagined what it would be like to detect radio signals ...

Assuming intelligent aliens know how to harvest energy from stars, would humanity be able to spot these high-level structures? Reading time 3 minutes Assuming aliens do physics like us but are ...

The truth about aliens may be out there, but don't expect them to look like little green men, RadarOnline.com can report. Extraterrestrial experts are trying to temper expectations and predictions ...