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THE MATERIAL WORLD: YOUR QUESTIONS MISSED A PROGRAMME? Go to the Listen Again page Listen to the answers to Your Questions about the world of science Click on a question to hear the answer from our experts What is the highest mountain that has ever existed? Aiden McGivern Is there a good place to hunt for meteorites? Richard Pike Do radiators heat mainly by convection or radiation? Dave Hindle Why does my seat feel warm if someone else has been sitting in it? Rob Greenacre Why do wind turbines usually have only three blades? Peter Elwood Why is it easier to pull a fully-laden wheelbarrow over ground than to push it? Phillip Apps, Notts Why don't clouds have a front and back end - and why do they have clearly defined edges? Dinah Lloyd and Tom Osorio When will the Earth's petroleum reserves expire and will we have the technology to compensate? Brian Murray Why is AIDS not transmitted by mosquitos? Adam Meredith Could solar panels on the Moon help the Earth's energy problems? Helen Frieth How likely is a manned mission to mars in the next 50 years? Kevin Mills Why are frost patterns different? Philip Mann Why are there are there two tides per 24 hours? Antonia and Nicholas Parsons Is the genetic code analogue or digital? Ron Taylor Does running in heavy rain to avoid getting wet really work? Helen Stringer Find out more & listen again to recent editions of The Material World RELATED LINKS The Material World homepage Questions, Questions BBC Science & Nature The BBC is not responsible for the content of external websites Audio Help DON'T MISS Science, Nature & Environment Programmes Current Programmes Archived Programmes

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