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.
Those 2 decisions set the precedent for the use of presidential portraits in spite of George Washington's original insistence that coins should never carry portraits; he felt that it was similar to the practice of putting the King's image on a coin like they did in England.