He also proposed a version of continental drift before Alfred Wegener where America, Asia, Africa, and Europe once formed a single continent, which broke up because of the separation of the moon.
他还提出一个类似大陆漂移学说的理论（在阿尔弗雷德·魏格纳之前），认为美洲、亚洲、非洲和欧洲曾经组成一个统一的大陆，但是在月球分离后分开来了。