Ten Most Extreme Substances Known to Man

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10. The Darkest Substance Known to Man

9. The Most Flammable Substance

8. The Most Toxic Poison

7. The Hottest Substance Ever

There are few things known to man hotter than the interior of a freshly microwaved Hot Pocket, but this stuff manages to break even that record. Created by smashing gold atoms together at nearly the speed of light, it’s called a quark-gluon soup, and it reaches a balmy 4 trillion degrees Celsius, a mere 250,000 times hotter than the inside of the sun. The amount of energy released in the collision was sufficient to melt protons and neutrons, which in itself could be featured on a list of things you never even knew were possible. Scientists think this substance could give us an idea of what the birth of our universe was like, so it’s good to see they aren’t just creating tiny supernovas for the fun of it. However, the really good news is that the soup was only a trillionth of a centimeter across, and only lasted for a trillionth of a trillionth of a second.

6. Most Acidic Acid

5. The Most Explosive Expolosive

4. The Most Radioactive Substance

Speaking of radiation, it’s worth noting that the glowing green rods of “plutonium” on the Simpsons are completely fictional. Just because something is radioactive does not mean it glows. I mention that because Polonium-210 is so radioactive, it glows blue. A former soviet spy, Alexander Litvinenko, was duped into consuming some without his knowledge, and he died of cancer shortly thereafter. This is not that kind of thing you ever want to mess with; the glow is caused by the air around it being excited by the radiation, and it can actually heat objects nearby. If the fact that something highly radioactive gives off heat, keep in mind that when we usually think “radiation”, we are thinking of things like a nuclear reactor or explosion, where an actual fission reaction is happening. This is just your run of the mill loss of ionized particles, not a runaway splitting of atoms.

3. The Hardest Substance

2. The Most Magnetic Substance

1. The Most Super Superfluid

Superfluidity is a state of matter (like solid or gaseous) that occurs at extremely low temperatures, has high thermal conductivity (every ounce of it is always exactly the same temperature), and no viscosity. Helium 2 is the “most” example of this. A cup of He2 will spontaneously flow up and out of a container, as if it just decided to leave. It also seeps right through otherwise solid materials because its complete lack of friction allows it to flow through otherwise invisible holes that would not allow regular helium (or water for that matter) to flow through. He2 did not wind up at number 1 just because of its ability to act like it has a mind of its own, though, it is also the most efficient thermal conductor on earth; several hundred times that of copper. Heat moves so fast through Helium 2 that it moves in waves, like sound (and is fact known as “second sound”), rather than dispersion, where it simply transfers from one molecule to another. Incidentally, the forces governing He2’s ability to crawl walls is called “third sound”. You can’t get much more extreme than a substance that required the definitions of 2 new types of sound.

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