
© Ken McGee/U.S. Geological SurveyPlumes of steam rise up from many spots along the Firehole River in Yellowstone National Park.
Yellowstone National Park's geysers, hot springs, fumaroles and other
hydrothermal features spew out a collection of
gases from deep within the Earth - steam, carbon dioxide, methane, neon, argon and helium. There's not enough of that last one, helium, for the park to start selling balloons or for visitors to sound like
chipmunks, but there's plenty for scientists to study.
Helium can bubble out of volcanic rocks that drive hydrothermal activity, but that's not where most of Yellowstone's helium is coming from, it seems. The park's gas originates deep in rocks where it's been stored for hundreds of millions of years, U.S. Geological Survey scientists
report today in
Nature.
Helium is the second-most abundant element in the universe - it's formed by the nuclear fusion of hydrogen atoms, a process that
powers stars - but it's pretty rare here on Earth. Lucky for birthday-party goers and clowns (and modern
medicine), helium can be extracted from reserves of
natural gas underground.
Helium on Earth can be found in
two main forms: Nearly all occurs as helium-4 (named thus because it has two protons and two neutrons), which can be produced during the
radioactive decay of heavy elements such as uranium. A tiny fraction (about one in a million) occurs as
helium-3 (two protons and one neutron), most of which has been present on Earth since the planet's formation and is a vestige of material that originally formed the planet.
Comment: A couple of other weird things that happened in Wichita, Kansas lately:
US: Hundreds of fish die in Wichita park's pond
US: Wichita, Kansas Experiences Rare 'Heat Burst' Overnight
As for water sources turning blood red, check out these recent cases:
Yet another European river turns 'blood' red overnight, this time in Northampton, UK, 16 Jan 2014
Another European river turns 'blood' red overnight, this time in Slovakia!, 03 Dec 2013
River turns blood red overnight in The Netherlands, 01 Nov 2013
Waters at Bondi Beach, Australia turn blood red, 28 Nov 2012
Yangtze River turns red, 07 Sep 2012
Lebanon: Beirut River mysteriously runs blood red, 16 Feb 2012
Texas Lake Turns Blood-Red, 01 Aug 2011