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Oumuamua: Asteroid that flew past Earth could have been a spacecraft sailing past us, Harvard scientists suggest
"A more exotic scenario is that 'Oumuamua' may be a fully operational probe sent intentionally to Earth vicinity by an alien civilization"
NASA prepared to launch probe to “Touch the Sun”
The project, with a $1.5 billion price tag, is the first major mission under NASA’s Living With a Star program
