Back in the Cambrian, new phyla and new classes arose. Nowadays we only get new species!

而在寒武纪，新的门和新的纲不断产生。如今我们只有新的种！”

So, which of these land-dwelling phyla first invaded the land?

哪种“门”类首先登陆陆地呢？

The scientists compiled a massive database of body measurements from five phyla and 17,208 genera of marine animals.

科学家们编制了一个庞大的数据库，其中包含五个门和 17,208 个海洋动物属的身体测量数据。

540 million years ago, for 50 million years, there was just this burst of creativity, making all of the phyla that exist now.

5.4亿年前，5000万年里，创造力的爆发，创造了现在存在的所有门类。