Safari Live - Day 337 | National Geographic

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Keep it together, wordsmiths! That’s right, the word in this video is conserve. Conserve is a verb, and it means to keep something safe, to protect a natural resource. You might also see it in its noun form, conservation, as in animal conservation. Let’s…

So in the last video, I talked about three-dimensional vector fields, and I finished things off with this sort of identity function example where at an input point (X, Y, Z), the output vector is also (X, Y, Z). Here, I want to go through a slightly more …

[Music] If the battle over monuments has been raging in towns across the country, the early skirmishes started at Ivy League universities like Yale. [Applause] Calvin College was named in 1933 after Yale alumnus John C. Calhoun, a senator from South Carol…

The moons of Mars explained. Mars has two moons, Phobos and Deimos. They are really tiny. How tiny? Compared to Mars or our own moon, pretty tiny. Although, tiny is a matter of opinion. Their surface area is up close to some of the smallest states on Eart…

Every morning, millions of us wake up, grab our phones, and immediately start scrolling through a sea of notifications, messages, and updates. It’s the first thing we do, almost instinctively, as if our smartphones hold the secret to starting the day righ…