In the early and mid 1990s, every musician I knew was obsessed with Helium. The 'Pirate Prude' EP and 'Pat's Trick' played on repeat at nearly every gathering I attended. And we didn't just listen to these records - we discussed them, the worlds they opened, novelistic and strange.
The federal helium program sells vast amounts of the gas to U.S. companies that use it in everything from party balloons to MRI machines. If the government stops, no one else is ready.
Modern low temperature physics began with the liquefaction of helium by Kamerlingh Onnes and the discovery of superconductivity at the University of Leiden in the early part of the 20th century.
A scientist worthy of a lab coat should be able to make original discoveries while wearing a clown suit, or give a lecture in a high squeaky voice from inhaling helium. It is written nowhere in the math of probability theory that one may have no fun.
It has long been known that the chemical atomic weight of hydrogen was greater than one-quarter of that of helium, but so long as fractional weights were general there was no particular need to explain this fact, nor could any definite conclusions be drawn from it.
Earlier generations of stars in the galaxy could well have had planets. But really, there was only hydrogen and helium to work with, so they'd all be gas giants and not small, rocky planets.