When did ancient vertebrates leave the oceans for dry land? New evidence tweaks the timeline!

After a brief rain 350 million years ago, a reptile pressed its claws into the ground. Its tracks now show the oldest-known vertebrate to take on dry land. Victoria, Australia - On the ancient supercontinent of Gondwana 350 million years ago, a reptile pressed its small claws into the rain-damp ground. Its tracks now show the oldest-known vertebrate to have abandoned the oceans for dry land, a new scientific study suggests.