Safari Live - Day 121 | National Geographic

The universe is a mind-boggling place. Actually, I’m not even sure I can call it a place. NASA says the universe is everything, but what they really mean is that it contains everything— all of space, energy, time, and matter, like you and me. But there’s …

You see a commercial promoting a swanky new gadget, and you just gotta have it. Your favorite celebrity endorses a product you’re not exactly sure what it is, but you gotta get your hands on it too. Right now is station wagon savings time in the west. Sho…

Please, put on your headphones – I promise that there won’t be any loud sounds, but this video is going to hurt. There’s a study about hypersounds and how they cause headaches: these sounds are too high-pitched to hear – like the one added to this video, …

Hi, I’m Fiona McDonald and today we’re finding out what chemistry means to the average Australian. How would you describe chemistry? [Laughter] Um, like test tubes. I’m not a very big science fan, so I don’t really know any much about it. No idea. H, c…

[Applause] Morning! Introductions are really funny. They paid me $60, so I wore a tie. Um, how many people—how many of you are 36 years or older than 36 years old? Yeah, all of you were born pre-computer. The computer’s uh, 36 years old. And there’s some…

We’re told let A and B be rational numbers and let B be non-zero. They had to say let B be non-zero because we’re about to divide by B. Is A over B rational or irrational? Well, let’s think about it. They’re both rational numbers, so that means that A, s…