Safari Live - Day 337 | National Geographic

Nadia wants to create a confidence interval to estimate the mean driving range for her company’s new electric vehicle. She wants the margin of error to be no more than 10 kilometers at a 90 percent level of confidence. A pilot study suggests that the driv…

I am about to drive the world’s first car. This was invented by Karl Benz, patented in 1886. Of course, this is not the real thing, this is a replica. But I’ve partnered with Mercedes to make a video about car safety. Yeah. (laughs) Right? There’s not a…

Hello, internet. Let’s talk about this map, this argument, and the Electoral College in general. In my “Trouble With The Electoral College” video from 2011, I was wrong to use the city limits for that part of the argument, rather than the more expansive m…

Hi everyone, Sal here with my three-year-old son Azad, and we’re excited to announce the launch of Khan Academy Kids, which is designed to take students like Azad, ages two to five, to become lifelong learners. Hi friends, welcome to my room! Kids love t…

Right now that you all know each other, I’d like to introduce our first speaker. Okay, I would like to welcome our first speaker, Phaedra Ellis Lumpkins, who’s the founder and CEO of Promise. Now, Promise went through the winter 2018 batch of YC and is wo…

(Birds chirping) - [Narrator] Shrouded in a blanket of clouds, they awaken. Their canopies of green glitter in the sun. Their wildlife start to slither. (Snake hissing) - Chirp. (Birds chirping) - And growl. (Growling) - And one of the planet’s richest ec…