Oumuamua, the 400m cigar-shaped object that flew past the sun recently at 59,030 mph probably isn't an alien spacecraft as the Harvard researchers alluded to but it is only a matter of time before an interstellar relation turns up to say hello.
The object's unusual trajectory and high speed sets it aside from other space objects such as asteroids and comets and researchers from Harvard suggested 'it may be a fully operational probe sent intentionally to Earth vicinity by an alien civilisation' which is true, it could be, but the more boring answer is it is probably just a comet.
'It has already been shown that its observed characteristics are consistent with a comet-like body ejected from another star system' explained someone from the ESA poo-pooing the alien theory.
Such is the immense size of the Universe and the billions of billions of star systems in it that to think that there isn't life somewhere out there is incomprehensible but we may have to wait a while yet until we meet them.
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