Why a helium balloon flies backwards when you hit the brakes

Why has everyone got a cold at the moment? How does an elemental diet treat inflammatory bowel disease? How does chlorine clean up drinking water? What is cholera? Can silver sterilise surfaces and water? Is static electricity down to positive or negative charge? What is reverse osmosis water filtering, and why is it controversial? Dr Chris Smith and Clarence Ford have the answers. Like this podcast? Please help us by supporting the Naked Scientists

How do dogs decode human speech? Can they actually understand one another, and do they bark with an accent? Also, do all animals pair for life? Why are biometric fingerprint scanners tricky for older people? And is AI damaging our ability to think for ourselves? Plus, what's the problem with asking AI to solve complex maths puzzles, and can it also help decode what animals are saying? Dr Chris Smith and Clarence Ford have the answers. Like this podcast? Please help us by supporting the Naked Scientists

Who scooped Nobel Prizes at this year's ceremony in Stockholm? How concerned should we be about AI's impact on society? Why do men have larger Adam's apples? How can we make sure we eat a balanced diet? What causes floaters in your eyes? Is the expanding Universe contracting elsewhere? And is there a new fluoride-free toothpaste gel that rebuilds teeth? Dr Chris Smith and Saskia Falken have the answers. Like this podcast? Please help us by supporting the Naked Scientists

Dr Chris Smith and Relebogile Mabotja explore why it's hard to reach a human in customer service. How did humans migrate from Africa, and can we trace our ancient paths? Why do people and animals have different neck sizes? Can you really hear your heartbeat when your head's on the pillow? Why is swimming in cold water easier than taking a cold shower? Why do your ears block when you yawn or blow your nose? Why don't you notice yourself growing? Like this podcast? Please help us by supporting the Naked Scientists

Dr Chris Smith and Clarence Ford discuss the world's hottest creature, why antimatter matters, whether weight-loss pills can cause blindness, and why some birds die when they fly into power cables while others can perch on them with impunity. Then, what are the risks of AI, can curly hair straighten out as we age, and how does hair colour change as we grow up? Plus, whether insects are a good source of protein. Like this podcast? Please help us by supporting the Naked Scientists