Who Built The Moon, Live Streaming, and Induction Sensors

Today I Learned:
1) Sometime in the not-too-distant future, humanity will go back in time and construct the moon. No, seriously, a guy on the internet told me: http://ift.tt/1okOaNY

2) People will live stream almost anything, given an audience. In addition to the usual Russian dash cams, there are live streams of people eating, walking to work, and coding. The last one particularly interests me -- this is third-hand, but apparently some programmer decided to program on live stream once, and he decided it was the best thing ever because it's basically like pair-programming with 10 helpers over your shoulder. Except the ten guys don't have to be paid. I feel like there's a lot of potential value to be had in this area.

3) An induction sensor is a sensor that detects nearby metal by watching for inductive effects. Basically, it has a little bit of running current, which generates a magentic field, which in turn affects the current. When a metal object is brought nearby, it changes the shape of the magnetic field and in turn changes the current. Induction sensors are used on some 3D printers to detect the print bed.