SYDNEY, June 18 (Xinhua) -- Sharks nearly perfectly follow the long-hypothesized "two-thirds scaling law," a mathematical rule that predicts how surface area and volume change with body size in large ...

新加坡世界锦标赛将于7月27日开幕，这将是麦金托什自去年巴黎奥运会大放异彩以来的首次重大国际赛事。去年在巴黎，她斩获3金1银，成为首位在单届奥运会上夺得3枚金牌的加拿大选手。