Safari Live - Day 121 | National Geographic

Hey, Vsauce. Michael here. Where are your fingers? Seriously. It’s a pretty easy question. You should be able to answer it. But how do you know? How does anyone know anything? You might say, well, I know where my fingers are. I’m looking right at them. O…

For each one of my guests, if they’re clearly not otherwise a scientist, I try to find out what kind of science encounters they had as children. Judging whether some moment with their math teacher or science teacher left a good or bad impression on them, …

In this video I’m going to talk about a unit of length known as the meter, which you might have heard of before. It’s really probably the most used unit of length in the world. So the natural question is: how long is a meter? Well, one way to get a rough…

Hi, I’m Sal Khan, founder of the Khan Academy, and I’m here to invite you to participate in an exciting project that we have around career. Our mission statement as a not-for-profit is to provide a free, world-class education for anyone, anywhere, and par…

In this video, we will begin to explore the field of ethology, which is the study of animal behavior. Animal behavior and the word itself, ethology, it has its roots in the Greek ethos. You also might be familiar with the word ethics. Ethos and ethics, yo…

A user whose name I’ve forgotten, unfortunately, was a supporter of public schooling. He claimed that even in the most favorable of circumstances, a large minority would be unable to afford schooling if a public option wasn’t available. This is an unjusti…