Off topics (Tiktaalik roseae)

Tiktaalik roseae was discovered on Canada by an american research team lead by Edward B. Daeschler and reported in 2006. This fossil is very important because it fills in a gap in the transition from fish to amphibians and provides clues as to how the transition took place.
Nature published October 16, 2008, the results of new researchs of the discovering team (A Devonian tetrapod-like fish and the evolution of the tetrapod body plan) showing that "Among the morphological changes that occurred during the 'fish-to-tetrapod' transition was a marked reorganization of the cranial endoskeleton."

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