Safari Live - Day 337 | National Geographic

Hello and welcome to Ed Talks with Khan Academy. I’m Kristin Disarro, the Chief Learning Officer at Khan Academy, and I am excited today to talk to Mike Flanagan, the CEO of the Mastery Transcript Consortium. We’ll find out what that is and what it means …

Our first story has serious global implications, the very survival of the human species, but it’s about something that really couldn’t get more personal—fertility. Researchers have recently found staggering drops in male sperm count in Western countries. …

[Music] Let us consider a classic relativity scenario. Your friend gets on a rocket ship and blasts off towards Mars at nearly the speed of light. During this journey, his clocks tick slower, his lengths contract, and when he arrives at his destination, h…

I was being asked to be John Gotti’s hitman. If I refused, John Gotti would kill me. I understood that the key part of my plan was to get Georgie Grosso drunk on drugs to keep him loose, so there was no problem killing him. I’m at the bar and Georgie Gro…

[Music] One of the things that’s so interesting about the giant sequoia trees is how long they can live: a thousand, two thousand, three thousand years. Although they are incredibly resilient, we’ve managed to change our climate so much. We just don’t rea…

We’re told Alexa is riding on a Ferris wheel. Her height above the ground in meters is modeled by ( h(t) ), where ( t ) is the time in seconds, and we can see that right over here. Now, what I want to focus on in this video is some features of this graph.…