Source: http://gizmodo.com/a-spoonful-of-this-new-material-can-suck-up-a-whole-roo-1640787388
A team of scientists in Denmark just invented a crystalline material that can absorb oxygen with astounding efficiency. How astounding? Well, a single spoonful of the stuff can suck all of the oxygen out of a room. The best part is that it can release it again with just a little bit of heat. Say goodbye to bulky oxygen tanks.