Anicent animals may have caused a mass extinction by devouring earlier creatures 'clinging on for grim death' - National Post

National Post

Anicent animals may have caused a mass extinction by devouring earlier creatures 'clinging on for grim death' National Post For markers of a mass extinction, the fossils dug up from the Namibian soil are not very impressive. The few animals caught in the rock are ribbon-shaped and worm-like. Many are nothing but impressions in 540-million-year-old sea bed muck, tunnels left ...