Scientists from the universities of Wisconsin-Madison and Manchester, U.K., Have reason to rejoice after a successful experiment, which caused hens to grow conical, saber-shaped teeth.

• 来自美国威斯康星大学麦迪逊分校和英国曼彻斯特大学的科学家们有理由欢喜雀跃,因为他们成功迪完成了一项实验,让小鸡长出冠形,军刀状的牙齿。