Keywords amphibians, evolution, Devonian period, fish-like ancestors, adaptation, life cycle, thyroid gland, larvae, bony fins, three-chambered heart More for You Judge says dismantling of USAID ...

4 min read When the Devonian period dawned about 416 million years ... credited with the giant evolutionary stride that led to the amphibians, making lobefins the ancestors of all four-limbed ...

The oldest winged fossil dates back 330 million years ago, suggesting that insects were among the first animals to leave the oceans for land during the Devonian period some 400 million years ago.