Hydrogen facts

Liquid hydrogen has long been used as a fuel in rockets, and now it powers some automobiles. Though hydrogen is the most abundant element in the universe, it doesn't occur naturally in liquid form. To make liquid hydrogen, you need to get gaseous hydrogen and get it extremely cold.
Gas

Production of liquid hydrogen starts with pure hydrogen gas. But pure hydrogen is extremely rare on Earth; nearly all the planet's hydrogen is locked in compounds with other atoms.
Extraction

Hydrogen gas can be obtained by extracting it from natural gas through a process called steam methane reforming, or by splitting water into its components--hydrogen and oxygen--through electrolysis.
Cooling

Once hydrogen gas has been isolated, it's pressurized and super-cooled to a temperature a little colder than minus-423 degrees F, which is hydrogen's boiling point. At that temperature, the gas condenses into a liquid.
Appearance

Liquid hydrogen is colorless, odorless, tasteless and non-corrosive. However, it's also extremely flammable; when liquid hydrogen is mixed with air, the slightest spark can trigger an explosion.
Fun Fact

Hydrogen's freezing point is about minus-434 degrees, not much colder than its boiling point. Chill hydrogen to that point, and it becomes a metallic solid.
Source:

Universal Industrial Gases: Hydrogen Properties

Air Products via Harvard University: Liquid Hydrogen

Stanford University: Hydrogen

NASA: Solid Hydrogen Particles

Read more:  http://www.environmentalleader.com/2010/01/18/universities-add-wind-power/

Want to help with Global-Warming? Please visit http://www.whiteearth.org
Want to read more about Global-Warming? Please visit http://www.christopherbeau.com
Please become a fan of the Facebook page http://www.facebook.com/pages/WhiteEarthorg/119367692642 and http://www.facebook.com/pages/WhiteEarth/165767310764
Become a friend on Facebook page http://www.facebook.com/christopherbeau
Follow me on Twitter http://www.twitter.com/christopherbeau
Become a follower of this blog
When you buy art on http://www.artsymphony.com 100% of your investment goes to sponsor WhiteEarth