They appear in the early Cambrian fossil record: the first examples of the most diverse phylum on earth. Who knew their skills would become the envy of human engineers?
Darwinists have to face the fact that a core prediction of their theory miserably failed an important empirical test.
Darwinians never had a rightful claim to them in the first place.
Frustrated by abrupt appearance, some evolutionists are simply declaring that there is no problem with the Cambrian explosion.
To see what evolutionists are up against, read about a giant trilobite found in Australia.