From what I know, nicotine is a stimulant. It's not much, but I hope it gets you close to a answer. :3
Answer:
...it is necessary for life.
Explanation:
continues to exist on the surface of Earth because the planet is at a distance far enough from the Sun that it does not lose its water to the runaway greenhouse effect, but not so far that low temperatures cause all water on the planet to freeze.
Answer:
Aristotle
Explanation:
Aristotle created his own system for mapping the stars first, the others studied and discovered things in different subjects. :)
