2018-02-02 11:51 thomas.godart "Why Alien Life Would be our Doom - The Great Filter" Kurzgesagt - In a Nutshell Why Alien Life Would be our Doom - The Great Filter play_circle_filled YouTube https://youtu.be/UjtOGPJ0URM labelKurzgesagt check_box_outline_blank labellife check_box_outline_blank labelbig picture check_box_outline_blank labelfuture check_box_outline_blank labelscience check_box