Have you ever looked at the beach and wondered how many grains of sand there are? That can be mind-boggling to think about. Scientists estimate that, depending on the grain size and density, a single ...

Time off from digital devices. Find out how a school in England challenges students to stay away from their gadgets ...

Human Planet, a cinematic experience, bringing you the most amazing human stories in the world today. Humans and wildlife surviving in the most extreme environments on Earth. The BBC has been ...