世界奇闻：螳螂

The underside of a mantid reveals the complex structures that evolution added to its simpler ancestors: compound eyes, bristled limbs, two kinds of wings. Scientists are finding that all these structures have deep roots. The same genes that build them in a mantid are turning up-----often doing different jobs----in less elaborate creatures.

螳螂的下面展示了进化为其较为简单的祖先增加的复杂结构：复眼，竖立的下肢，二种翅翼。科学家发现所有这些结构有其深刻的根源，在一只螳螂身上，构成它们身体的同样基因正在被发掘出来 —— 经常取得不同的成果 —— 在较为简单的生物中。