Hmmm...there are over 30 known types of wolves, though some are extinct, now.
Tin foil is usually made from aluminum. They just still call it tin foil, since it used to be tin. Aluminum is cheaper, though more flammable.
Rocket fuel is made from Aluminum.
K, not P, is the symbol for Potassium. P is something else, entirely.
In a list of 3 or more objects, such as Object 1, object 2, and object 3, the comma preceding the word "and" is known as the Oxford comma.
The character for S in Greek became our modern capital E.
Okay, that's all for now. Some of those just chained with each other.
*Combo attack! 500 pts.*