I love to keep up with electronics. One of my favs is to watch this one:
https://www.allaboutcircuits.com/
This week, we have an article about the Space Race and it includes the circuit diagram of the transmitter used in Sputnik 1. Imagine launching vacuum tubes into space!
https://www.allaboutcircuits.com/new...gps-space-era/
What are your favorite scientific sites for we fellow Nerds?