![]() Let’s take the tetrapods, an animal group comprising amphibians, reptiles, birds and mammals, all of which are characterized by having four limbs, a backbone and lungs. Moreover, many well-preserved fossils have been found in hot, arid, sparsely populated deserts like the Sahara, indicating that they were once full of water and life.Īnd so, layers of rocks and the fossils they contain can expose the evolutionary development of different species and animal groups because the order of the layers always reflects their age. But fossils have another significance: they help us understand our planet’s past and the creatures that lived a long time ago.Īfter all, sea shells have been found on Mount Everest – evidence that an ocean once existed there – and fossils from warm-adapted animals have been found in the icy Arctic, proof that the region once had a tropical climate. ![]() Fossil fuels are very important for meeting the high energy demand in our modern society. ![]()
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