Lizards Give Birth to Their Young Like Mammal, Evolutionary Genes May be the Key
Scientists are studying lizards' evolution of birth, from laying of eggs to live births and they have succeeded in pinpointing the evolutionary genes from which the species is developing in order to 'build' a new way they reproduce. The study discovered that a remarkably close amount of the same genes involved in the lizards' pregnancy were distributed between other mammals and vertebrates that bear their young.
Source: natureworldnews.com