Fossil Find Shows Fish Hips Grew Strong Before Life's First Steps
The discovery of new fossil materials from the ancient fish species Tiktaalik roseae has revealed a key link in the evolution of hind limbs. The newly described, well-preserved pelves and partial pelvic fin from this 375 million-year-old transitional species between fish and the first legged animals, reveals that the evolution of hind legs actually began as enhanced hind fins, contrary to the existing theory that large hind legs developed after vertebrates transitioned to land.