The present scientific consensus is that birds are a group of theropod dinosaurs that originated during the Mesozoic Era. As dinosaurs morphed into birds, they shrank dramatically and adopted a more babylike skull shape. Our poster shows the million of years of evolution that made this happen... Our non-paper poster material is waterproof and tear resistant. It is meant to last a lifetime and can even be used outside. This option does not come with frame. Custom orders accepted.