Recent content by Philippe Bzh

black rock Hi, I think at first sight the black rock can to be magmatic rock, very hard (isn't?). Quartz, right! And perahps a metal meet. At see later and good chance!

The Reptiles flyed with the same caracteristics than the birds of today. The "écailles" or "plumes" are similars. The constitutions of the bone too. The worse difference is the cold blood versus hot blood. But it's the possible evolution more near of the possible between the ways. In Mamiferes...