[ABN 505]

..a gas called Helium-4, a very rare type of Helium....

[Helium-4 (42He or 4He) is a non-radioactive isotope of the element helium. It is by far the most abundant of the two naturally occurring isotopes of helium, making up about 99.99986% of the helium on Earth.] Is that you Mr White? Yeah, SCIENCE!

[NY.SS-Bar9]

............Jacob Lowenstern and colleagues from the US Geological Survey, who were monitoring volcanic activity in the park, calculated that about 60 tons of helium is released every year. ............ They estimate the gas began to escape around two million years ago during a series of volcanic eruptions.

But will my voice sound funny if we go to Yellowstone on vacation?