Safari Live - Day 337 | National Geographic

In this video, I want to talk about the system of Jim Crow segregation, which was common in the United States from about 1877 to approximately 1954, although it goes a little bit further than that. Now, you’re probably familiar with some of the aspects of…

Hey, I’m Eric Porter. I’m a professional mountain biker, and I’m going to show you how to fix your bike in the field. Bikes are better than they’ve ever been, and not much stuff breaks anymore. But things are going to happen, and you need to know how to t…

Stocks based in the world’s second largest economy are uninvestable again. Bernstein sales trading desk’s Mark Schilsky said in a note on Monday, “This idea of Chinese stocks being uninvestable has been a recurring theme in the media over the past few wee…

We’re told a certain pet store chain has three types of dog food, and each comes in bags of two different sizes. Matrix A represents the store’s inventory at location A, where rows are food types and columns are bag sizes. So, see, it’s store A that’s wha…

So, uh, 2020 happened. A year we’re all ready to leave behind; a year we’re all willing to forget and pretend just didn’t happen. Because let’s face it, it wasn’t a pretty one. In case you forgot, the year started out with looming threats of world war thr…

In this video, we’re going to be talking about conjugate acid-base pairs. We’re going to introduce the idea of a conjugate acid-base pair using an example reaction. The example reaction is between hydrogen fluoride, or HF, and water. So, hydrogen fluorid…