Safari Live - Day 368 | National Geographic

So I’ve got a vector field here V of XY where the first component of the output is just ( x \cdot y ) and the second component is ( y^2 - x^2 ). The picture of this vector field is here; this is what that vector field looks like. What I’d like to do is co…

Last week, Kevin, I discussed an Oxfam report that contained a startling statistic: that the world’s richest 85 people hold precisely the same wealth as the three and a half billion poorest people. Now, if you saw the show, you won’t be surprised to hear …

Imagine a world where you wake up, head to the office in the morning, to a party with friends in the evening, and then a live concert at midnight, all while sitting in the warmth of your home or from the comfort of your bed. That might just be part of hum…

What I want to do in this video is think a little bit more about how populations can be regulated. Broadly speaking, we can think of the regulation of populations in two different categories: there’s the regulation dependent on density - so, density-depen…

What’s up guys, it’s Graham here. So first of all, I am shocked that more people aren’t talking about this, because we are about to face the worst U.S. debt crisis in history. Instead of addressing the problem head-on, we’re putting up statues of Walter W…

Hi, I’m Kim from Khan Academy and I’m here with Megan, who leads us teacher education. Hi Megan! Hi Kim! In this video, we are going to walk you through the Khan Academy learner or student experience. So Megan, who is considered a learner on Khan Acade…