Exploding the myth

 作者:余霓     |      日期:2019-03-07 02:15:01
By Catherine Zandonella A NEW analysis of the fossil record casts doubt on the long-held assumption that biodiversity has been steadily rising for millions of years. If the findings are right, they could sink one of the major theories in the field of palaeobiology. Until now, most researchers accepted that biodiversity mushroomed after a mass extinction 250 million years ago. But a new database of marine fossils suggests that levels of biodiversity have actually stayed largely unchanged since that time. The implications are huge, says John Alroy at the University of California at Santa Barbara. “Our results, if correct,