Ex-CIA Spy: China Is Preparing & We're Not Paying Attention! Here's What Happens If They Takeover!

[Applause] After three uplifting photographic quests, our assignment inspiration finalists pitched us their photos, hoping to be the ones chosen to go on assignment with National Geographic Travel. We judges had an incredibly tough decision to make. Each …

Early humans communicated with pictures and markings painted on cave walls and began to gradually work out symbols. As these markings spread and were understood and accepted, then you had the widespread transmission of ideas. We can see the very early day…

There’s the traditional magic trick of pulling the rabbit out of a hat, and these, and card tricks, and generally we think of our attention being sort of misdirected rather than there being an illusion. So, Suzanna, tell me about the kinds of misdirectio…

Part 2b: Region S is the base of a solid whose cross sections perpendicular to the x-axis are squares. Find the volume of the solid. All right, so region S we see it right over here. In the last part, we already said that this function is f and this func…

What we’re going to do in this video is try to find the derivative with respect to X of (x^2 \sin(X)) all of that to the third power. And what’s going to be interesting is that there are multiple ways to tackle it. I encourage you to pause the video and …

Imagine there’s a hotel with infinite rooms. They’re numbered one, two, three, four, and so on forever. This is the Hilbert Hotel, and you are the manager. Now it might seem like you could accommodate anyone who ever shows up, but there is a limit, a way …