Star Trek turned one of its oldest alien species into a full-blown nightmare — and this episode laid the terrifying ...

In M. John Harrison’s​ short story ‘The Crisis’, first published in 2017, the world has been invaded by aliens that look like ...

For instance, what if we really are being visited by aliens from other worlds and they turn out to be aggressive, violent, ...

Star Trek can usually make rubber forehead aliens not just cool, but turn them into pop culture icons. Their five worst ...

Scientists explore the Fermi paradox, suggesting that alien civilisations may self-destruct before becoming detectable, ...

Originally published in the January 1970 issue of National Geographic. In remote African highlands, a daring American woman ...