(May 20, 2017 at 8:13 am)Alex K Wrote:(May 20, 2017 at 8:09 am)Gawdzilla Sama Wrote: More like 500,000,000 years ago.
Really? Wow. While 200 mill is too late of course, 500 mill sounds very early! Is the egg-laying back then homologous to today's verterate egg laying?
Vertebrate egg laying is directly descended from that early egg laying.