Cambrian Explosion
What is the Cambrian explosion? Why was Darwin puzzled by it? Learn more about this topic in this short article: https://www.grisda.org/cambrian-explosion-and-darwins-doubt-1
What is the Cambrian explosion? Why was Darwin puzzled by it? Learn more about this topic in this short article: https://www.grisda.org/cambrian-explosion-and-darwins-doubt-1