"This is the first time we have been able to show that gravity is an important factor in sperm’s ability to navigate through ...

Do little green men exist? Was 'Men In Black' a documentary? Prediction markets are pricing the probability of a U.S. government confirmation of alien life before the year 2027. Find out why traders ...

Elon Musk's hopes of one day colonising other worlds might be nothing more than a pipe dream ...