Lizard species evolving to give birth
http://news.nationalgeographic.com/n...ve-birth-eggs/
^ Pretty cool stuff. An Australian Lizard species is transitioning from laying eggs to giving birth. And it's happening before our eyes!
Quote:
"Now we can see that the uterus secretes calcium that becomes incorporated into the embryo—it's basically the early stages of the evolution of a placenta in reptiles," Stewart explained.
Quote:
In general, the results suggest the move from egg-laying to live birth in reptiles is fairly common—at least in historic terms—because it's relatively easy to make the switch, Stewart said.