"In our case, finding a Lucy is unique. No one will ever find another Lucy. You can't order one from a biological supply house. It's a unique discovery, a unique specimen"

This quote by Donald Johanson is referring to the discovery of the fossilized remains of a hominin types called Australopithecus afarensis, which is more frequently referred to as "Lucy". The discovery of Lucy was a distinct and exceptional occasion, as it was the first time that a fossilized hominin types had actually been discovered. It was a distinctive discovery, and it is extremely not likely that another fossilized hominin types will ever be found. This is due to the fact that the conditions needed for fossilization are exceptionally uncommon, and the possibilities of finding another fossilized hominin types are slim. Additionally, it is difficult to purchase a fossilized hominin types from a biological supply home, as they do not exist. For that reason, the discovery of Lucy was an unique and impressive occasion, and it is extremely not likely that another fossilized hominin species will ever be found.