The earliest recorded vertebrates had four eyes to escape predators in the ancient Cambrian ocean, according to half-a-billion-year-old fossils from China that shed light on our evolutionary origins.

Rare fossils discovered in southern China reveals that the earliest creatures with spines — ...

Figure 1: Key features of gene regulatory networks (GRNs), and consequences of changes in GRN components. “Although changes to GRN architecture that are due to cis-regulatory change have occurred ...