Oh man, I have had to face palm so badly in this topic already. Alright I'm not going to argue the evidence for evolution (because I know you all have probably already seen it and ignored it) but I'll correct a few falsehoods that have been posted.
1) Micro/Macro evolution are different.
They are the same thing, just viewed at different timescales. The theory of evolution provides the mechanics for small changes but over a long time these add up to big changes. Even in a short time evolution that is far more than cosmetic can occur.
http://www.sciencedaily.com/releases/2008/04/080417112433.htm
2) Evolution has never been observed.
Fossil record is a perfectly good observation. Take the horse for example.
http://www.talkorigins.org/faqs/horses/horse_evol.html
You are I believe taking a distorted view of 'observed'. Observed does not require that we observe something as it happens, it only requires that evidence of what happened has been collected. Whether it occurs at the time of the event or 13 billion years later is not important.
3) Evolution deals with the origin of life/the univserse/stars/molecules.
No it doesn't, while evolution may be used in the terms for those theories it is not the 'theory of evolution' we are talking about.
4) Evolution is only a theory.
Actually according to the scientific view evolution is a fact, the theory of evolution is the explanation of this fact.
http://en.wikipedia.org/wiki/Evolution_as_theory_and_fact
Edit: Oh and answer the question in the title, it's the fossil record.