Safari Live - Day 368 | National Geographic

A question that some of you might have asked, or maybe haven’t asked, is where do we get our hydrogen from? Because molecular hydrogen, if it was just in the air, it is lighter than the other things that make up the air, so it would just float to the top …

BL, you swallowed a tapeworm by accident. What now? Maybe you ate infected raw meat, or perhaps you drank contaminated water. Well, that’s less important now; they’re in your body. How bad it might get depends on whether it’s a lava or an egg. Option on…

Until recently, the vast majority of the world population worked on farms, and the total production of the world’s economy was mostly the total agricultural output. And this output was limited by the fixed size of the land. The total output of the economy…

So I have the same green rectangle up here and down here, and what I want to do is measure its width. But we’re going to measure its width in two different ways. Up here, we’re going to measure its width in terms of how many of these paper clips wide the …

We are told that Teresa consumes both bagels and toy cars, and they tell us that the table above shows Teresa’s marginal utility from bagels and toy cars. The first question is, what is her total utility from purchasing three toy cars? So pause this video…

So let’s talk a little bit about what’s probably not your favorite subject. It’s definitely not mine, and that is death. Uh, and uh, it’s not something a lot of us think about. I remember when I was a kid and I used to see these ads on TV for life insuran…