With the evolution of jaws some 420 million years ago, jawed animals diversified rapidly into a range of niches that remained stable for the following 80 million years, despite extinctions, habitat loss and competition, say researchers.
With the evolution of jaws some 420 million years ago, jawed animals diversified rapidly into a range of niches that remained stable for the following 80 million years, despite extinctions, habitat loss and competition, say researchers.