Mark Zuckerberg on Taking Risks and Finding Talented People

The last thing we want to do is lose this cat after a long journey and all this effort and all the permitting and everything that’s gone into getting him here. Yeah, and if you’ve got a dart gun, right, running full here into this fence. So these are four…

In this video, I want to explore the question of what impact does the environment have on human migration. We have a couple of specific examples here, and before we dig into those, I want to make a few broader points about the environment as a historical …

Hey everyone, Sal Khan here from Khan Academy. Welcome to our daily homeroom live stream. If it’s your first time and are wondering what is this? This is a live stream that we started doing every day since school closure started happening ‘cause we realiz…

We’re told that Joe started his math homework. He finished 23 problems by himself. He finished 13 more problems with help from Sal. I don’t know if they’re talking about me or not. And then they say there are nine math problems left. And then they ask us…

All around the world, marijuana is being decriminalized, or even made legal. But is this really a good idea? In the online debate, the harmful sides are often downplayed. So let’s look at the three most powerful arguments against legalizing marijuana. Ar…

[Narrator] The heart pumps blood throughout the body, carrying oxygen and nutrients to every cell. It’s this circulation of blood that is vital to sustaining life. The heart is an organ made up of several tough layers of muscle. The pericardium is the thi…