Safari Live - Day 42 | National Geographic

The diode is our first semiconductor device, and it’s a really important one. Every other semiconductor is basically made from combinations of diodes. Here’s a picture of a diode that you can buy. This is just a small little glass package, and that distan…

Ancient Greece was not even a cohesive empire; it was made up of many city-states led by Athens and Sparta. But despite its fragmentation, it made innumerable contributions to not just Western civilization but civilization as a whole. Those are contributi…

Bouncing across a scene, tumbleweed established the Wild West as Western. But more than just prompts, tumbleweed are real, and tumbleweed are alive. Well, they were alive. Each tumbleweed starts as a tiny seed on the craggy landscape, putting down roots, …

If you could just give me an idea of, uh, you know what sort of asking price you guys are looking for it. I think on that aircraft is somewhere around 13, uh, 13, 13 and a half, something like that. Is that in the price range you’re talking about? You’r…

So here I’d like to talk about what the gradient means in the context of the graph of a function. In the last video, I defined the gradient, um, but let me just take a function here. The one that I have graphed is (x^2 + y^2) (f of xy = (x^2 + y^2)). So,…

Did you know that the water you drink is actually the same water that dinosaurs drank over 65 million years ago? It might be hard to believe, but your water is actually really, really old. In fact, water on Earth is much older than the dinosaurs. Scientis…