bombs from 15,000 feet to cries of ‘you sank my battleship!’, thus passing [Billy Mitchell]’s famous test. The World War II-era US Air Force was extremely interested in turbo engines.

Science presenter Jon Chase explains Newton’s third law with the help of some skateboarders. The skateboarders stand on separate boards and then one of them pushes away from the other one ...

I want to talk about forces. So, what are forces? Well forces cause things to change, and a beautiful example of that is Newton's first law of motion. It says that things stay still or carry on ...