Isaac Arthur on MSN
They outlived their planet - then stopping became more dangerous than leaving, "keep moving"
A nomadic alien fleet may not be a species, empire, or refugee group in the way humans expect. It could be a moving ...
Long before Roswell or modern sightings, hundreds of people in Sweden reported seeing a fleet of strange objects flying silently across the sky on May 16, 1808. Witnesses described glowing, spinning, ...
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