With sapphire waterfalls, lava rain and orbits around dead stars, these distant worlds push the limits of what’s possible.
The research is mounting up that we might not be alone in this big wide world. So what's the likelihood that aliens are out ...
It's one of life's biggest questions - are we alone in the universe? Now, one of Britain's top space scientists has declared ...
A Harvard University astrophysicist has sparked a furious debate by warning he cannot rule out that extraterrestrials are paying us a visit.
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