Question

Are we alone in the universe?​

Answer 1

Perhaps not. Astronomers have been scouring the universe for places where water worlds might have given rise to life, from Europa and Mars in our solar system to planets many light years away. Radio telescopes have been eavesdropping on the heavens and in 1977 a signal bearing the potential hallmarks of an alien message was heard. Astronomers are now able to scan the atmospheres of alien worlds for oxygen and water. The next few decades will be an exciting time to be an alien hunter with up to 60bn potentially habitable planets in our Milky Way alone.

Answer 2

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Standing under a starry sky and gazing up at its wonder, it's easy to believe that we're alone in the cosmos. The distances are vast, and, after all, we know of only one planet in the universe that hosts life — ours. But it's possible we may not be alone even in our own universe

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