Interesting. The theory that I heard was that it was the end of "snowball earth" that drove it. But https://www.nature.com/news/what-sparked-the-cambrian-expl

Interesting. The theory that I heard was that it was the end of "snowball earth" that drove it. But https://www.nature.com/news/what-sparked-the-cambrian-explosion-1.19379 https://www.nature.com/news/what-sparked-the-cambrian-explos... suggests that your version is better supported by current research.