A chemical substance (also called a pure substance) may well be defined as any material with a definite chemical composition in an introductory general chemistry textbook. According to this definition a chemical substance can either be a pure chemical element or a pure chemical compound. But, there are exceptions to this definition; a pure substance can also be defined as a form of matter that has both definite composition and distinct properties.
Han solo. While there is still debate about who shot first in the movie, in science Han Solo was first. Not only was the species Han solo created a decade before Peckoltia greedoi, the species also lived considerably earlier than the fish. Han solo is a species of trilobite, a group that is no longer extant. The fossils of H. solo, the only known species in the genus Han, were found in the Ordovician Zitai Formation of southern China. The original publication states that the genus was named after the Han Chinese, while the species name solo refers to the fact that it was the youngest fossil found to that date in its family. Turvey, however, later stated that his friends had dared him to name a species after a Star Wars character.
Han Solo. Han Solo is a character in the Star Wars franchise. In the original film trilogy, Han and his co-pilot, Chewbacca, became involved in the Rebel Alliance's struggle against the Galactic Empire. During the course of the Star Wars narrative, he becomes a chief figure in the Alliance and succeeding galactic governments. Star Wars creator George Lucas described the character as a loner who realizes the importance of being part of a group and helping for the common good. Harrison Ford portrayed the