The video transcript discusses a unique period in Earth's history, the Lopingian epoch, where marine environments were surprisingly safer than terrestrial ones. This was due to a devastating extinction event on land that wiped out dominant predators, while marine life, though diminished, faced less extreme predation. The Lopingian featured terrifying terrestrial apex predators like gorgonopsids, while oceans harbored fewer large, dangerous creatures. The extreme heat and aridity of the Lopingian landmasses made them inhospitable, further emphasizing the relative safety of the oceans. The epoch ultimately culminated in the "Great Dying," Earth's most severe extinction event, which even further devastated life on land compared to the oceans.

ExtinctZoo: Youtube