The Science of Sparks, Candles and Lightbulbs

Dave Ansell

Would a matchbox spark in space? How do re-igniting candles work? How does an energy-saving lightbulb work? Does the sun rotate like the earth? We answer these questions this week, as well as reveal how mobile phone charms work, investigate why New Zealand has mainly non-deciduous trees and find otu if rainwater is safe to drink.