Science The Fermi Paradox: are those pesky aliens hiding? (science video) September 23, 2021September 23, 2021 ColonelFrog 195 Views 0 Comments The Fermi Paradox Alien civilisations seem to be absent from the Universe, but might they simply be hiding, and if so, how would they do so? Isaac Arthur investigates this throny issues in a new forty-minute-long documentary.