There is a substance that makes up 98% of the observable matter in the universe,

yet you'll almost never encounter it in its native form.

It's inside your body right now and life wouldn't be possible without it.

Yet, it's an extremely dangerous substance that could

kill you if you handled it improperly. I am of course talking about hydrogen.

Learn more about hydrogen, the lightest and most fundamental of all the elements

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I've done several episodes on particular elements. All of them so far have been

pretty high up on the periodic table, gold, uranium, and plutonium. In this

episode I'm going to be going all the way down the periodic table to the simplest element there is. The element with the atomic number of one, hydrogen.

Hydrogen isn't just the first element on the periodic table. It was literally the first element.

Based on our current understanding of the Big Bang,

about 13.7 billion years ago,

the universe was a soup of some atomic particles.

Eventually, as the universe cooled,

these particles coalesced into protons, neutrons, and

electrons, and those elementary particles then combined to create atoms. The simplest

...