"Science of Ripley's Believe It or Not!" exhibition held in Vancouver, Canada

A visitor looks at a figure of Robert Wadlow, the tallest man in history at the "Science of Ripley's Believe It or Not!" exhibition at Science World in Vancouver, Canada, March 9, 2018. As part of its North American tour, the exhibition showcases all kinds of curious objects, artifacts and science findings that people can learn and question about. (Xinhua/Liang Sen)