fill an approximately 25-million-year gap in knowledge by reconciling the molecular clock—or pace of evolution—with the fossil spore record—the physical evidence of early plant life gathered by ...

3 min read During the Ordovician period, part of the Paleozoic era, a rich variety of marine life flourished in the vast seas and the first primitive plants began to appear on land—before the ...

We have the skeleton of a sail-backed plant-eater named Gordodon ... which is the ancient life or Paleozoic history of New Mexico.” During the Paleozoic Era, life crawled out of the sea for ...