Links for December 1, 2020Posted on Tuesday, Dec 1, 2020 7:43 AM↪︎ ☹️ ☄️Losing Arecibo's giant dish leaves humans more vulnerable to space rocks, scientists sayTagsAreciboPuertoRicoSpacedefenseRelated Links2023-04Strange circular dunes on Mars spotted in these NASA photos2022-10Live Starlink Satellite and Coverage Map2022-04New atomic clock loses only one second every 300 billion years2022-01Space Junk Could Be Creating No-Go Zones for Satellites2021-05Spacewar! On PDP-11 Restoration