Dinosaur and other prehistoric reptile teeth are among the best-known fossils. From Tyrannosaurus rex to Triceratops, sauropods, mosasaurs and pterosaurs, these specimens provide evidence of life millions of years ago and contribute […]
For approximately four billion years, life on Earth consisted of single-celled organisms. Around 575 million years ago, multicellular organisms appeared and began to diversify. The causes of this event, known as the Avalon explosion, remain uncertain. This […]
Although humans live on land, approximately 375 million years ago all vertebrates inhabited aquatic environments, while terrestrial ecosystems contained plants and invertebrates. During the transition towards life on land, some fishes developed structures that preceded limbs and enabled movement beyond […]
