Safari Live - Day 129 | National Geographic

So we’re asked what is the charge of a calcium ion with 18 electrons. So pause this video and see if you can work that on your own. I will give you a little bit of a tip: a periodic table of elements might be useful to see where calcium sits on that perio…

If tiger sharks are showing up in the shallows in greater numbers, then it’s not because of deep blue. The reason for the attacks remains elusive, but while scouring the ocean for an explanation, experts come across something else that also ensnares large…

This metal is about as close to magic as it is possible to find in nature. I just don’t get it. It can adjust its arrangement of atoms to return to some predefined shape, but it also converts between mechanical and thermal energy. And it can stretch up to…

You know it’s kind of funny when most people start a proper financial journey when they’re at the point of “this is it, okay, I’m done living this way, I’m getting my together.” Well, they think they know what kind of milestones will bring them the most j…

We’re told that Taylor opened a restaurant. The net value of the restaurant, in thousands of dollars, two months after its opening is modeled by ( v(t) = 2t^2 - 20t ). Taylor wants to know what the restaurant’s lowest net value will be. Let me underline t…

What’s up you guys, it’s Graham here. So we got to sit down today and have the talk. And no, this is not the talk where I go and ask you to hit the like button, although we’ll have that one a little later. Instead, we’re gonna be having the talk about the…