In which John Green teaches you about the life and death of one of history's great explorers, Captain James Cook of the British Navy. He charted large swaths of the Pacific ocean, laid claim to Australia and New Zealand, and died a...

The hangout covers the benefits of biodiversity—and which benefits have been scientifically tested; how biodiversity boosts innovation; and how researchers are measuring biodiversity in the face of environmental...

Today we're teaching you vocabulary and sentences for Valentine's Day. I'm (Meredith) am teaching both you and Kate how to sign 21 words and 4 sentences in American Sign Language, ASL. Check out the chapter markers below or in the video...

The durable properties of lead mean that it has been utilised by humans for thousands of years, with Roman pipes still seen today.



Chemistry - Periodic Table - Learni

ng Points.

Lead is a so

ft, malleable...