Safari Live - Day 368 | National Geographic

(helicopter flying) (alarm systems beeping) [Instructor] Ditching, ditching, ditching. (water rushing) So, I’m alive. (laughs) All right, here’s the deal. My last mission as a U.S. government civil servant was in a helicopter off the coast of Hawaii. W…

So where we left off in the last video, we have the Neo-Babylonians, the Chaldean Empire, being conquered by the Persians led by Cyrus the Great. That’s in 539 BCE that Cyrus the Great conquers Babylon, and they’re able to establish a significant Empire. …

What’s up guys? It’s Graham here. So it’s no surprise the middle class is getting screwed, with incomes falling behind the cost of living, minimum wage dropping to its lowest purchasing power since 1956, and consumer debt ramping up alongside inflation. M…

And welcome to you from myself, Steve Falconbridge, joined by Fergus on camera. We are out in Toomer, in Sabi Sands, with degrees of 33 degrees Celsius and 89 degrees Fahrenheit. It is a nice warm day; the Sun is beating down. We have developed a bit of a…

Let’s say that Y is equal to five minus three X over x squared plus three X, and we want to figure out what is the derivative of Y with respect to X. Now, it might immediately jump out at you that look-look, Y is being defined as a rational expression her…

I am about to get buried in concrete. And while that’s happening, I’m going to explain everything you need to know about this substance. So the first thing that I want to clear up is the difference between cement and concrete, because people often mix the…