@WFS,World Fossil Society,Riffin T Sajeev,Russel T Sajeev A bottom-dwelling, mud-grubbing, armoured fish that swam in tropical seas 423 million years ago is fundamentally changing the understanding of the evolution of an indisputably indispensable anatomical feature: the jaw. Scientists have unearthed in China’s Yunnan province fossils of a primordial fish called Qilinyu rostrata that was about […]