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By Michelle Wheeler Summer scorcher and no air-con? Dunking your feet in water can make the heat more bearable, Aussie research suggests. Sponging yourself all over is even better, and has the added benefit of lowering your heart rate.

Double Helix magazine is looking for your science questions! Our Microscope column answers the thorniest science queries you can throw at us. Email us at Helix.Editor@csiro.au or via our contact details below and you could have your question published. Here’s a sample question to get you thinking. Aisha Goshti asks: Why does the Sun makes…