In 2000, in fact, Peter Ward of the University of Washington and his colleagues reported evidence of abrupt die-offs of rooted plants in end Permian rocks of the Karoo Basin in South Africa.

• 事实上，2000年美国西雅图华盛顿大学的华德等人就报告过，在南非卡鲁盆地二叠纪末期岩层中，有证据显示当年有根植物是突然暴毙的。