Safari Live - Day 337 | National Geographic

How many moons could Earth handle? The main factor is space. Any moon needs a clean orbit and we have to take two things into account. One, it can’t be too far; otherwise, it won’t follow a stable orbit around us. Two, it can’t be too close either, or the…

In this video, a special guest and I will be taking a look at companies funded by Y Combinator and giving our feedback on the design of their company’s website. Welcome to Design Review! My guest this week is Zayn Ali. He was the first product designer at…

Hey Steve, I just landed from Vegas and I’m super jet lagged. Why is that? So, the problem is it’s not from jet lag from time zone difference. The reason you’re feeling jet lagged is because of cabin altitude. Cabin altitude in an airplane is the altit…

Let’s say that we have the polynomial p of x, and when expressed in factored form, it is (x + 2)(2x - 3)(x - 4). What we’re going to do in this video is use our knowledge of the roots of this polynomial to think about intervals where this polynomial would…

[music playing] On the eve of Princess Diana’s funeral, the royal family is returning to London, hoping perhaps to quell some of the criticism of their actions since Diana’s death. REPORTER: The queen’s convoy arrived in London. As it swept up to Bucking…

In the last video, we discussed how the Portuguese began to really expand their exploration around Africa with the invention of the caravel, a fast new ship that could sail into the wind, and how Spain, newly united with Ferdinand and Isabella, completed …