Then of course, you start talking about welding pipeline inspection, things of that nature. So there's quite a broad spectrum of how helium is utilized. And again it's a scarce commodity. So ...

Cosmic ray helium particles were found to follow a Double Broken Power Law, with spectral hardening from 1.3 TeV and softening from 30 TeV You are free to share and adapt the material. Attribution ...

This happens with light as well as sound. Our Sun contains helium. We know this because there are black lines in the spectrum of the light from the Sun where helium has absorbed light. These lines ...