An alert 10-year-old British girl saved her family and 100 other tourists from the devastating Asian tsunami – because she had learnt about the giant waves in a geography lesson, it emerged today. Tilly Smith was holidaying with her mother Penny, father Colin and seven-year-old sister Holly on Maikhao beach in Phuket, Thailand, when the tide suddenly rushed out. As the other tourists watched in amazement, the water began to bubble and the boats on the horizon started to violently bob up and down. Tilly, who had studied tsunamis in a geography class just two weeks earlier, quickly realised...