For those wedded to an evolutionary interpretation of life’s history, the fossil and genetic evidence leave the origin of arthropods a major mystery.
Eyes with lenses are believed to have evolved independently multiple times, but all evolutionary scenarios face insurmountable barriers.
Spiders are another of nature’s master engineers. About half of known spider species (order Araneae) construct webs made of silk.
If you’ve ever watched ants busily tunneling in an ant farm, you may have noticed that the intricate finished product rarely collapses. Why is that?
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?