Add Yahoo as a preferred source to see more of our stories on Google. The so-called 'Pink Planet' might not be a planet at all. - NASA / Goddard Space Flight Center illustration An enormous world ...

A mysterious cloud above a Canadian town sparked UFO claims online, though its unusual shape also resembled a natural ...

Holidaymakers have one major thing in common with scientists who are on the hunt for alien life: their plans are often thwarted by clouds. The clouds on alien worlds are such a long-standing issue – ...