Tsundere is a pretty common term used in the anime community but there are still many who don't know what is actually means. Tsundere is actually a term derived by fans to classify a type of anime character that is becoming more common, usually a female lead.
Throughout the Corps more than 4,000-mile journey, Captains Lewis and Clark recorded 178 plants and 122 animals not previously known to science. Lewis recorded and pressed and preserved some 240 different plant species and brought them back to Washington, along with hundreds of animal and bird skins and skeletons.
While many other expeditions were made, none of them actually found new scientific discoveries, like Lewis and Clark's expedition. On these expeditions, when they found an animal or specimen, they would send them back to the known part of the USA. Some of these specimens were alive, but most were parts and bones.