Insect-eating mammals had already begun to appear when dinosaurs ruled the earth, 2.5 billion years ago. They gradually took the place of the declining dinosaurs and established the kingdom of the mammals.
廿五億年前，地球仍是恐龍﹘ ﹘爬蟲類的天下，食蟲動物已開始崛起；當恐龍逐漸消失，它們取而代之，建立了空前的哺乳動物王朝。