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.
In 1903 paleontologist Elmer Riggs proposed that the animal called Apatosaurus was really a young Brontosaurus (albeit a very large youngster). Because the name Apatosaurus had been published first, it had priority over âBrontosaurus.â But in 2015, a new study revealed more than seven differences between Apatosaurus and Brontosaurus. Marshâs idea that they were two separate animals was likely correct, after all. Brontosaurus was reborn.