Harvard researchers raise the possibility that it's a probe sent by extraterrestrials. Maybe it's an alien spacecraft. Scientists have been puzzling over Oumuamua ever since the mysterious space object was observed tumbling past the sun in late 2017. Given its high speed and its unusual trajectory, the reddish, stadium-sized whatever-it-is had clearly come from outside … Continue reading …Scientists say mysterious ‘Oumuamua’ object could be an alien spacecraft… →