Safari Live - Day 121 | National Geographic

What we’re going to do in this video is talk about acidity, and in particular we’re going to talk about the pH scale. Now the first question is: what does pH stand for? It turns out that there’s some debate why we have this lowercase p here. We know why …

This is a map of what the Americas looked like at around the year 1750. As you can see, it was for the most part divided as colonies by a bunch of European powers. Most prominent is Spain; you can see in this peach-brownish color it had control all the wa…

In this Sunday motivational video, we’re going through 50 very short rules that are mandatory to know if you are to ever going to achieve your biggest goals. Let’s get started: Know what your goals are. Unless you have a clear idea of where you’re going,…

What we’re going to do in this video is a little bit more of a deep dive into the House of Representatives. Now, we’ve already talked about how either chamber of Congress can introduce general legislation, and if it gets approved by one chamber, it has to…

Let’s see if we can take this quadratic expression here, ( x^2 + 16x + 9 ), and write it in this form. You might be saying, “Hey Sal, why do I even need to worry about this?” One, it is just good algebraic practice to be able to manipulate things. But as…

In 1984, something unexpected came across people’s TV screens as they watched the Super Bowl: droves of brainwashed people march through an apocalyptic world. Some might have recognized it for being reminiscent of George Orwell’s popular novel “1984.” Tal…