User blog comment:1mavstone/Got Questions? 2: Electric Boogaloo/@comment-33881745-20190907185151/@comment-32003826-20190907232725

Dinosaurs laid eggs, the fish that first crawled out of the sea laid eggs, and the weird articulated monsters that swam in the warm shallow seas of the Cambrian Period 500 million years ago also laid eggs. They weren’t chicken’s eggs, but they were still eggs.