Space elevators revisited, iPhone contacts (setting up groups), malware quarantine (why), JPG metadata (EXIF), WiFi calling explained, Profiles in IT (Charles Kao, father of fiber optic communication), H1B Visa program overhaul, NIST revealed new atomic clock, robots will transform farming, NASA lands Insight probe on Mars, and printers hacked worldwide (to print PewDiePie ad). This show originally aired on Saturday, December 1, 2018, at 9:00 AM EST on WFED (1500 AM).