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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.

Jenny had a short, wide fish tank. She wanted to change the water, so she put the fish tank on a table and put a tall bucket on the floor right underneath. She was about to get a hose and siphon the water into the bucket, but before she started, she did some measuring.