THE DAY OF THE NEXT DINOSAUR KILLER: 2/2: #Bestof2021: #HotelMars: Planetary Defense, September 2022. Andy Rivkin @asrivkin, planetary astronomer on #TeamAsteroid, @JHUAPL. David Livingston @SpaceShow SpaceShow.com (Originally posted December 3, 2

Sep 19, 2023, 01:08 AM