Safari Live - Day 368 | National Geographic

Hi everyone, Sal Khan here from Khan Academy. I just want to remind everyone that, as we’re going through what’s clearly a very difficult time, especially, well, in the world generally, but especially in education, the entire team here at Khan Academy is…

What we want to do in this video is get some practice estimating multi-digit division problems. So here we’re asked to estimate 794 divided by 18. Now, if you wanted to get the exact answer, you’d probably have to do—in fact, you would have to do—some lon…

All right everyone, we’ve gotten to one of my all-time favorite multivariable calculus topics: divergence. In the next few videos, I’m going to describe what it is mathematically and how you compute it and all of that. But here, I just want to give a very…

This rotting tree becomes a food source for insects, and they in turn might provide a meal for me. There, right there is exactly what I’m looking for. These are just crawling out of it as I’m cutting open this log. There could be hundreds of these inside.…

So on my foraging journey, I met this one. It’s pure sugar. Imagine, when you are out there, starving, and suddenly there is sugar. In the middle of that little thing there, you’ve got little insects. The insects build a little house, and inside is pure s…

We’ve talked about things that might drive inequality, things that Thomas Piketty refers to as forces of divergence. But now, let’s think about, or at least some of what he cites as forces of convergence. So, forces of convergence are things that might ma…