Old school social distancing: Apollo 11 astronauts Michael Collins, Buzz Aldrin and Neil Armstrong chill-out in the Mobile Quarantine Facility after Earth’s first successful moon landing. They spent 2.5 days in this converted Airstream trailer while traveling back from their recovery ship (the USS Hornet), then 21 days at the Lunar Receiving Laboratory in Houston. What’d they do for 3 weeks? Wrote reports, met with scientists through a big glass wall, and celebrated Neil Armstrong’s 39th birthday. (Photo: NASA)