Safari Live - Day 337 | National Geographic

Hey, Vsauce, Michael here, and you guys are my family. Scientifically speaking, geneticists tell us that every single person on earth is, at the least, 50th cousins with everybody else on earth. It kind of has to be that way. Think of it like this—you ha…

We are told a large nationwide poll recently showed an unemployment rate of nine percent in the United States. The mayor of a local town wonders if this national result holds true for her town. So, she plans on taking a sample of her residents to see if t…

What we’re going to do in this video is give ourselves some practice in the first step of u substitution, which is often the most difficult for those who are first learning it. That’s recognizing when u substitution is appropriate and then defining an app…

Each square in the grid is a unit square with an area of 1 square cm. So, each of these squares is 1 square cm. This is 1 square cm, and this is 1 square cm, and so on. Now we’re asked, what is the area of the figure? By figure, I’m sure they mean this bl…

Hello wordsmiths! The word we’re featuring in this video is invalid. That’s right, it’s not true—or rather, that’s what it means: incorrect, false, not accepted. It’s an adjective. It comes from Latin, where the prefix “in” means not and the word “valiru…

[music playing] ALBERT LIN: It’s literally a city in the clouds. Maybe those Spanish stories weren’t just legends because that’s what a real lost city looks like. HELICOPTER PILOT: [inaudible] 1 0 1 2. ALBERT LIN: That’s Ciudad Perdida, the Lost City. …