Safari Live - Day 368 | National Geographic

Long walk on a cold day. Thing I’ve learned about injuries is listen to your body. If your body’s hurting, it’s trying to tell you something. In this case right here, this leg’s trying to tell me not to use it. Just got to take it easy, take it one step …

What we’re going to do in this video is talk about the notion of equilibrium in a macroeconomics context. So let’s review a little bit of what we’ve already studied about aggregate demand and aggregate supply. So this vertical axis here, that is the pri…

Why are we so fascinated with Mars? There’s this visceral connection that we have. It’s been a constant steady light in the night sky for us. You and I can go outside tonight on a clear night, look towards the southwestern sky, and see a bright orange sta…

Pascale Rickets has invented a game called Three Rolls to Ten. You roll a fair six-sided die three times. If the sum of the rolls is 10 or greater, you win. If it is less than ten, you lose. What is the probability of winning Three Rolls to Ten? So, ther…

[Music] A while back I was teaching physics in California. I got to class and I was all like, “Hey class, you want to hear a physics joke?” “Yeah, okay totally!” “Does light hold mass?” “I don’t know, does it?” “No, it’s not even Catholic!” Oh man, …

Throughout the history of humankind, there have been several technological disruptions that have changed the course of human evolution. From the invention of the wheel, the development of agriculture, the invention of the printing press, to the internet, …