A team of German and British scientists have used fossilised shark teeth to reconstruct the climate of the North Sea during the Palaeogene period, between 40 and 60 million years ago.

• 一队德国和英国的科学家使用鲨鱼牙齿的化石来重新构建4-6千万年前北海的第三纪时代的气候特征。