http://www.cnet.com/news/one-spoonful-of-this-stuff-could-turn-you-into-aquaman/#ftag=YHF65cbda0 Scientists have been able to replicate a crystalline structure of cobalt that is able to absorb oxygen in a concentration 160 times larger than the concentration of oxygen in the air around us. They're experimenting with different method of releasing the oxygen from the crystal, be it by temperature, atmospheric pressure or even light. On the cool side, the crystals could actually absorb oxygen from surrounding water in an underwater setting, and if the method for releasing said oxygen is refined enough, at some point in the future we could be looking at being able to dive underwater without any oxygen tanks. That would be pretty remarkable. On the dangerous side, it's said that a teaspoon of the substance could absorb all of the oxygen in an entire room. And it's unclear how quickly this process could take place because they say the process can take place in days, hours, minutes or even seconds depending on atmospheric conditions. I can't be the only one to be shuddering at the thought of the substance being weaponized. But in all likelihood it's going to be really expensive to make the substance and it's cheaper just to get a bunch of explosives to blow up a wide area as opposed to de-oxygenating it.