I think that basically what the Nitrogen method is, iirc any of the noble gasses will work in that capacity. He mentions problems with that method but never elaborates on what they are, I have heard that if done right you basically go to sleep. And if you buy helium on the internet you want to make sure it's pure helium, many manufacturers of party helium started diluting their helium with oxygen to stop people from using them in suicide kits.

"In the next few decades"?! More like "a few decades ago".
Perhaps if we had started population control in the 80's with the goal of cutting global population in half by 2000 AND did the rest of what he suggests we might have a chance...we did not.

By the time we understood there was a problem there were less than a few decades left to solve it...that was around 40 years ago, and we've done everything possible to accelerate the damage we do on every front since then.

Ocean acidification is happening today, it's getting worse, it's slow to react to change so will continue to get worse even if humans disappeared tomorrow, it has built in feedback loops that have been triggered like melting methanehydrates and sequestered CO2 that are being released faster every single day, and we are increasing the man made causes every year. There is a point where it reaches critical acidification, the point where diatoms can't form their skeletons, and then the entire ocean system dies. That's far worse than the apocalypse it sounds like, not just because 50-60% of our oxygen comes from the ocean, but also because the rotting biomass creates huge amounts of not just more methane, compounding the greenhouse problem and further acidifying the oceans, but also immense amounts of hydrogen sulfide, which spread as huge poisonous clouds around the globe.
We are on our way to a man made Permian extinction, when >95% of all species went extinct and near 99% of all biomass was lost. We will not survive it as a species....and we don't deserve to.

No, sorry, ditching meat and dairy didn't cure his arthritis. It's likely that swimming and training to freedive relieved his symptoms by effectively oxygenating his blood more efficiently and to higher levels. There is no cure for arthritis.

Free diving requires excessively high iron levels in your blood, which is exceptionally difficult to achieve on a vegetarian or vegan diet. That's why very few top ranked freedivers (or other top ranked athletes) are vegan instead of all of them.

True, vegetables don't have cholesterol, but poly and monounsaturated fats they do contain can still raise human cholesterol levels when over consumed. It's just not as simple as plant good, meat bad.

No clue where you get this 20% boost of O2 use efficiency claim....have any references or even explanations? It contradicts everything I find that shows only around 1/2 the iron found in those few vegetables that contain iron is useable by the body unlike iron found in dark and red meats.

Interesting backstory to this diver Stig Pryds - like many other people , he cured his arthritis by ditching meat and dairy.

He's supposed to be in a wheelchair and on medication.

He started swimming as therapy for his arthritis too, and turns out he's the worlds best freediver......which no doubt makes him talented, but when you think about how not eating cholesterol (only in meat/dairy/eggs/fish) will clean out your arteries, it's no wonder his blood is able to stay oxygenated for longer periods. Along with eating greens, he'll be around 20% more efficient at utilizing oxygen and creating energy.

I wonder if he'll be in the upcoming James Cameron's Game Changers documentary.

I was always under the impression that backdrafts occur at the moment you opened up a predominately enclosed fire to lots of oxygen rapidly. I had no idea it could take so long to reignite/explode.

Backdraft (wiki) https://en.wikipedia.org/wiki/Backdraft

Americans put liquid oxygen on bagels?!

I've been following this story here. Sure was happy when they were found alive -- I had started to lose much hope after they'd been gone 4+ days.

The bad news today is that a Thai volunteer diver, a former SEAL, died on a return trip from setting up extra air supply tanks along the route. BBC coverage is very good:
https://www.bbc.com/news/world-asia-44734385

Most cave diving experts think that it would be extremely risky to try to move the kids out by diving. One of the on-scene people from the US has said that none of the boys know how to swim, let alone dive, and the conditions in cave diving make it so that panic can quickly lead to disaster.

Unfortunately, a new complication has come up. Oxygen levels in the chamber they are in are now at 15%, down from the usual 21%. They are working to get piping in to supply fresh air, but logistics of that are difficult since they need about 3 miles of piping. And to make matters worse, heavy rains are in the forecast, which will further stress the pumping that they are doing to keep water levels low in the cave.

The Thai head of the Navy rescue operation was quoted today as saying that "At first, we thought the children could stay for a long time... but now things have changed, we have a limited time." If that is correct and can't be resolved (due to dropping oxygen levels, rising water, or whatever), they may have to opt for the risky exit via diving. So definitely not out of the woods yet.

That was cute...

That reminds me of my kid at that age...just one long run on sentence that never really seems to have a break and flows from one stream of consciousness to the next eventually building to what you believe will be the dramatic finale but really is just an involuntary gasp triggered by an oxygen starved brain that once replenished resumes its partnership with the mouth to bring on a fourth act soliloquy of just how awesome My Little Pony is and oh don't you love that new pony sunset shimmer sparkle fart?

So, you think rust isn't iron?

Yes, this is aluminum, just as ruby and sapphires are states of aluminum (technically corundum, the technical term for aluminum oxide) but because this is not naturally occurring they were smart to make the chemical composition it's name, AlON (aluminum, oxygen, nitrogen).
You make a new useful compound, you can name it whatever you like. ;-)

Can we really call it transparent aluminum? I mean, then its also solid oxygen! at room temperature!

Red Transparent Aluminium! aka Ruby
Blue Transparent Aluminium! aka Sapphire

AMAGAD. WHAT IS THIS ON MY KITCHEN TABLE? TRANSPARENT SODIUM!!?!??!?!?!1

I guess it gets split? Oxygen fuels the fire and hydrogen explodes? Or is the plastic going off like c4?

You mean apart from the explanation that the speed required to run a marathon is close to a flat-out sprint for most people, and that the maximum speed that you can sustain over two hours depends on the three factors that they explained in the video? It was discussed around 2:10 in the vid.

The handful of people have physiology that gives them unusually high oxygen uptake, lactate thresholds, and running efficiency.

It's slightly clickbaity because Nike... and despite serious cheating their attempt on the sub-2 hour marathon to sell shoes failed by 26 seconds.

p.s. The Grauniad had an article on what the rest of us can learn from these elite runners https://www.theguardian.com/lifeandstyle/2017/may/06/secrets-two-hour-marathon-men-alter-running

I dunno if it's gunpowder that they put in firecracker fuses, but once it's ignited, gunpowder doesn't need an external source of oxygen around to burn. I think it frees more oxygen than it uses or something like that, but I'm too lazy to google it.

I would bet; I imagine that the fish wintering under the ice had a tough moment with that shockwave.

In another note: why didn't the water put out the fuse? From simple starvation of oxygen if not actual dousing?