Awesome Hypotheticals

There’s a lot of crazy and negative stuff going on in the world these days, but is it really the end times? Kurzgesagt asks the hypothetical question of when the last human might be born by examining population growth, birth rates, and animal extinction rates. But human ingenuity, technology, and space travel are serious wildcards.

Our bodies, brains, and blood cells thrive on oxygen, and inhaling a little extra is good for an energy boost. But is there such a thing as too much of a good thing? What If explores the hypothetical of what might happen if the Earth’s atmosphere had twice as much o2.