Avi Loeb, Harvard Professor of Astrophysics, on why the Oumuamua visitor was more likely than not to have been a light-sail powered piece of alien tech – either a probe, or just a relay in a comms network – as well as why humanity and Earth really aren’t special; why our Sun is a relative late-comer to the galaxy and aliens are likely to be millions if not billions of years more advanced than us; the Drake equation; and asks are we really ready for discovering an alien civilisation, plus, how long might our human civilisation last?
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