Quoted from Argonavis:
No so. The bone of contention as any well researched evolutionary apologist should know is not speciation, but links from one kind to another. Therefore my quote was not out of context but rather quite germane.
Species can progress, and yes it either takes a long time or exceptional circumstances to occur. Creationists do not deny speciation, however this progressive species change is not as straightforward as some might want to claim.
How any reputable fossil biologist can be certain of their clams is something of a mystery given the requirements for a viable species change occurring. See 'Haldane's rule', and note it is a rule not a law. A modern day illustration of the difficulties in getting new species off the launch pad as a viable new species might be the woes of the courtship of the Male Tiger and the Lioness. The offspring of such a mixed marriage results in infertile males yet fertile females. No new species here. On the otherhand The Male Lion and the Tigress will apparently produce fertile young of both genders.
As to species the Tigon might well qualify, but it is still a member to the 'Kind' Panthera; it is not a 'New Kind' And it is the links between 'Kinds that are missing.
Doug