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！”

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，创力的爆发，创了现在存在的所有门类。

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

科学家们编纂了一个庞大的数据库，包含了五个门和17208个海属的身体测量数据。

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

哪种“门”类首先登陆陆地呢？

But we found that there's a whole new phyla that we never knew existed before lying inside of its crust.

但我们发现，在其地壳内部存在着一个全新的门类，这是我们之前从未知晓的。