When the Hindenburg airship approached its dock in Lakehurst, N.J., on May 6, 1937, the blimp that held the passenger decks aloft was filled with hydrogen. This element, the simplest -- and most abundant -- in the universe, has one proton with a single electron revolving around it. Hydrogen also weighs the least of all the elements atomically. It can pack quite a punch, creating vast amounts of energy when oxygen and an ignition source are introduced. When the Hindenburg exploded, the world witnessed the power of hydrogen.
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