Safari Live - Day 368 | National Geographic

So I have a question here from the Cots, Trickle, and Townsend Chemistry and Chemical Reactivity book, and I got their permission to do this. It says a solution of potassium permanganate has an absorbance of 0.53 when measured at 540 nanometers in a 1 cen…

When you hear of Ancient Rome or the Roman Empire, the Roman Republic, immediately images of the Roman legions come to mind. These conquering armies conquered much of the Mediterranean. You might have images of the Roman Senate; names like Julius Caesar a…

The broadcast is now starting. All attendees are in listen-only mode. Hi everybody, thanks so much for joining us today. I’m Vicki Lang. I’m our learning scientist here at Khan Academy, and I’m joined by Dan from our marketing team who will be facilitati…

We’re going to do in this video is have an overview of one of the greatest empires and really civilizations of not only the ancient world but of the world. And that is Persia. We see a map here; this is the extent of the Persian Empire at around 500 BCE u…

Foreign s have always been interested in finding ways to live longer. The oldest surviving story in recorded history is Mesopotamia’s 4,000-year-old Epic of Gilgamesh, and this desire shows up even there. After the death of a close friend, our hero Gilgam…

What’s up, Graham? It’s guys here, and here we go again. After a temporary pause, as of a few hours ago, the Federal Reserve increased their interest rates yet another 25 basis points, bringing us to the highest level that we’ve seen since the peak at the…