Safari Live - Day 42 | National Geographic

Hi everyone, Sal here from Khan Academy. Welcome to the Homeroom live stream! We had a little bit of a hiatus, but now we are back. I had a torn calf and other things, but I’m almost fully recuperated. But thanks for joining! We have a really exciting con…

Hey there, relaxer! It’s that time of year again, time to start thinking about your goals and resolutions for the upcoming year. Last year, you said this year was the year. Well, maybe it’s actually time to take yourself more seriously. Now here’s the th…

We are told the differentiable functions x and y are related by the following equation: y is equal to the square root of x. It’s interesting, they’re telling us that they’re both differentiable functions. Even x is a function must be a function of somethi…

So let’s add six over two x squared minus seven to negative three x minus eight over two x squared minus seven. And like always, pause the video and try to work it out before I do. Well, when you look at this, we have these two rational expressions and w…

The cheapest way to make your own swimming pool and a bus who thinks he’s the Kool-Aid man. It’s episode five of IMG. We begin the day with hoodies that zip up to make you look like Captain America, a ninja, Batman, or Boba Fett. Last week, BuzzFeed gave…

The Earth isn’t flat. This is something we’ve known now for thousands of years. Aristotle proved it empirically by traveling to Egypt and witnessing new constellations of stars from the other side of the globe. After Eratosthenes used no more than a stick…