This is an excellent NBC's Today Show news program with Harry Smith reporting about students using amateur radio to contact the International Space Station.
![]() |
| International Space Station |
Earth’s core is solid iron. Around this inner core is a layer of liquid iron. The interaction between the liquid and solid iron is responsible for generating electrical currents and a powerful magnetic field. The magnetic field is in alignment with the Earth's rotation and extends all the way into space.
![]() |
| Vacuum Tube |
"We chose our system name, Google, because it is a common spelling of googol, or 10100 and fits well with our goal of building very large-scale search engines."