Safari Live - Day 42 | National Geographic

Never before in history, have there been so many people on Earth as right now. Our numbers have skyrocketed, from 1 billion in 1800, to 2.3 billion in 1940, 3.7 billion in 1970, and 7.4 billion in 2016. The world population increased fourfold in the last …

What is the area of the shaded figure? So down here we have this green shaded figure, and it looks like a rectangle, except it has this square cut out in the middle. So when we find its area, we can think of it exactly like that. We want to know how much…

Hi everyone! Welcome to our daily homeroom livestream. For those of you who are wondering what this is, this is something we started a few months ago. It’s really just a way to stay connected, have interesting conversations about education and other topic…

What’s up? Grandma’s guys here! So lately, there’s been this ominous looking chart. It’s beginning to scare a lot of investors, and today we have to talk about it. On the left, we see the Japanese stock market, which peaked in 1992, crashed 80 percent ov…

This program features live coverage of an African safari and may include animal kills and carcasses. Viewer discretion is advised. Good afternoon, everybody, and welcome to Open Skies in the Maasai Mara! You can see there’s a few little puffy clouds in t…

What we’re going to do in this video is think about what properties of a shape are preserved or not preserved as they undergo a transformation. In particular, we’re going to think about rotations and reflections. In this video, both of those are rigid tra…