Quick Answer. When a solid turns into a liquid it is called fusion, more commonly referred to as melting. When a material moves from one state of matter into another it is called a phase transition. Fusion is just one of approximately different states that matter can phase through.
Before the dinosaurs, there were Triops. Fossil Triops more than 200 million years old have been discovered. By comparison, dinosaurs date back only about 60 million years...just 'youngsters' in terms of geologic time. Triops are distant relatives of trilobites. Triops means three-eyes while the name trilobite means three lobed or three segments.
The famous flying reptiles of the Mesozoic Era. Dozens of species are known from the fossil record, including the largest flying animals in history. These were quite unusual as reptiles go, many covered in fuzz and much more active than we think of for âtypicalâ reptiles like lizards or turtles. Dinosaurs. Dinosaurs are so unusual itâs arguable whether âreptileâ is a good word for them, with their upright stance, high metabolisms, and (in many cases) feathery covering.