How do fingers snap?

It’s friction – and surprisingly fast motion that allows us to snap our fingers. Use this explainer resource to investigate how we can snap our fingers in this resource for Year 4, 7 and 8 students studying forces and energy … Continued

How do radio telescopes work?

Astronomers have different ways of watching the universe, including optical telescopes like Hubble and radio telescopes like the SKA. But how do radio telescopes actually work? This animation shows you how both dish and dipole antennae receive radio waves to … Continued