Moving in a different direction, I would be interested to hear everyone's guesses as to when (or if) we will run out of helium. Or, do you think we will go get some more before we run out (like from the moon, Uranus or Saturn)???
I am particularly interested because I use it for deep diving. If we run out, we will not be able to do the deep dives we are doing while keeping a clear head. Little is known about the physiological effects when using substitutes, such as hydrogen (which has already been used for exteme-depth diving).
Cheers, Jordan