> Flight for instance evolved four separate times (bugs, birds, bats, and non-extinct pterosaurs all fly[flew], but none of them share a common ancestor that could also fly.)
Surely, "now-extinct pterosaurs", not "non-extinct pterosaurs", unless I missed some very newsworthy discovery.
Surely, "now-extinct pterosaurs", not "non-extinct pterosaurs", unless I missed some very newsworthy discovery.