Biologists at Temple University created a spiral shaped view of evolution . They used data from 'molecular clock ' studies on more than 50,000 species . These analyse mutations in DNA to calculate when species evolved apart . It shows dogs and humans shared a common ancestor more than 290 years ago . Crows and chimps separated from each other 94.2mm years ago . The study shows the diversity of life on Earth has grown at a constant rate . This contradicts the traditional view of evolution as occurring in bursts .
Biologists at Temple University created a spiral shaped view of evolution . They used data from 'molecular clock ' studies on more than 50,000 species . These analyse mutations in DNA to calculate when species evolved apart . It shows dogs and humans shared a common ancestor 94.2m years ago . Crows and chimps separated from each other more than 290m years ago . The study shows the diversity of life on Earth has grown at a constant rate . This contradicts the traditional view of evolution as occurring in bursts .