2017-11-20 18:43 thomas.godart The Most Astounding Fact by Neil deGrasse Tyson The Most Astounding Fact - Neil deGrasse Tyson play_circle_filled YouTube https://youtu.be/9D05ej8u-gU labelNeil deGrasse Tyson check_box_outline_blank labelbig picture check_box_outline_blank labelinteresting check_box