The green slime is called Rad Slime. It has not yet been added to the game, but, by using commands you can spawn it. The Rad Slime emits some radiation because of which you cannot stay too long near them. On the slime wikia it says it will be added in the
George Washington wore several different sets of dentures over the course of his lifetime, none made of wood. Instead, the dentists treating him would have used the cutting-edge materials of the time: bone, ivory, lead, brass, gold, and the castaway teeth of horses, donkeys, cows, and, yes, human beings.
George Washington intentionally did not sit for this presidential era portrait while wearing military attire. He wanted to emphasize the Office of the President's civilian nature. - George Washington, Gilbert Stuart, ca. 1796. [NPG.2001.13]. Courtesy National Portrait Gallery, Smithsonian Institution.