Meet the only known reptile with a true placenta

When many of us think of reptiles we immediately envision them as egg-laying creatures, but there are some reptiles that actually give birth to live young. All of the reptiles in this second category possess a rudimentary placenta (the vascular tissue which, in mammals, nourishes unborn offspring), but until recenty,‚Ķ » 10/07/11 1:47pm 10/07/11 1:47pm