Why do you see flashes and patterns when you press your eyeballs? Would an antimatter magnet attract normal matter magnets? What is the hardest human bone to break? We take on your science questions this week, as well as explore the bed of Lake Windermere the gravity hills of Barbados and the first discovered habitable exoplanet. Plus, a flapless aircraft takes flight, how the brain decides which hands to use and why Raman spectroscopy offers a rum deal for anti-drug squads. In Kitchen Science, we find out why spit can form strings of beads... Like this podcast? Please help us by supporting the Naked Scientists