Safari Live - Day 337 | National Geographic

What I’d like to do in this video is use some geometric arguments to prove that the slopes of perpendicular lines are negative reciprocals of each other. So, just to start off, we have lines L and M, and we’re going to assume that they are perpendicular,…

[music playing] NARRATOR: Day breaks over the lovely forested south rim of the canyon, lighting up a dead pine that would seem to have little purpose. But this pine is the central bank and trust of the acorn woodpecker. And every inch is studded with nea…

[Michael] Where is everyone? We have been listening for messages from outer space for more than half a century, and so far… silence. Why? Are we truly alone in the universe? Or is everyone else acting like us and just doing a lot of listening? Maybe we ne…

What we have here are six different distributions, and what we’re going to do in this video is think about how to classify them or use the words that people typically use to classify distributions. So let’s first look at this distribution right over here…

All right, going away. I got two in the L right now when battle’s about to kick off, and it’s imminent. Definitely get a major shot of adrenaline. Um, because you can’t freeze at that point. We have trained for years to overcome that fight or flight sensa…

Hello readers! Today I’ll make a video about summaries. A summary retells the main ideas of a passage, but in a much shorter version. Cool, great, done! You can learn anything. David out. Sorry, I made a goof. See, I summarized what was going to happen …