What Do Protons Taste Like?

Steve takes a long while to get to the interesting chemistry part of the video, spending a whole lot of time explaining our sense of taste and how each taste aspect (sweet, sour, savory, etc) work.

It's really interesting, and it's really great applications of macromolecule chemistry.

Admittedly, the answer to the video's title question turns out to be less interesting and more obvious (once Steve explains it) than it might have.

What salt tastes the best? Li, Na, K, Rb, Cs and more

This just seems dumb, so, so, so remarkably dumb.

There is one chemist, Carl Wilhelm Scheele, who famously tasted every chemical he discovered.

I'll warn you that there are some casual, NSFW words here and there in the video. It is, after all, a bunch of idiot friends (with access to chemistry lab supplies) tasting their way through the alkali metal chlorides.

Please do NOT try to repeat this experiment. 

LD50 values from SDSs, links included...

• LiCl - 526 mg/kg (source)
• NaCl - 3000 mg/kg (source)
• KCl - 2600 mg/kg (source)
• RbCl - 3800 mg/kg (source)
• CsCl - 2600 mg/kg (source)
• NH₄Cl - 1650 mg/kg (source)
• CaCl₂ - 1940 mg/kg (source)
• SrCl₂ - 2250 mg/kg (source)

That just measures the risk of death, but I'd wonder about other hazards than just straight up death along the way.

With that being said, it was interesting to see people 

Slow Mo Rainbow Fire Tornado - The Slow Mo Guys

Oh, wow...

I've posted about fire tornados before, even including one of the Slow Mo Guys the first time they filmed the multi-fan set-up.

I've posted about rainbow fire before, usually in service of saying "don't use methanol."

I've never posted about rainbow fire tornados before.

Do yourself a favor and watch this, especially the slow motion rainbow fire tornados at 1:20 and again at 4:40.

So pretty...so pretty...

If anybody finds an explanation as to why the colors appear in rainbow order in the flame tornado, please share it, because I've no clue at all.

The tunnel where people pay to inhale radioactive gas

Tom Scott's YouTube channel is among my favorites. I subscribe to his main channel and highly recommend that you do, too. His second channel, not so much.

I very much appreciate that he does research to verify what his videos say and often posts links to his cited sources in the description of his videos.

So here when he says that he has done his research and can't definitively say that the radon gas that is intentionally breathed in for pain relief is either scientifically verifiable or is scientific bunk, I believe him and appreciate the transparency in this video.

I certainly took a similar journey to what Tom describes at 2:20: skepticism, looking at research (I admittedly didn't do independent research), and finally *shrug*. I hope that someone takes Tom up on his offer to have somebody do a double blind study on the radon 'mine' showcased in the video.