They must use helium as a carrier gas.

This is to avoid the risk of hypothermia caused by using helium as inflator gas.

The Carolina researchers used liquid helium to grow the ice rings at a very low temperature.

Such temperatures are best attained by the use of microrefrigerators using helium as the working fluid.

After our sun stops using hydrogen to make energy, it will use helium in its very hot core.

All modern Roziere balloons now use helium as a lifting gas.

Though I don't think you get a vast amount of extra lift compared to using hydrogen or helium alone; just a few per cent.

The church's website previously had instructions on "how to kill yourself" by asphyxiation using helium.

The balloon is a composite type that will use both hot air and helium for lift.

Would it be possible to create aerogel lighter than air by using helium instead of air?