Watch Professor Steve Jones giving his lecture on this subject at the Royal Society. Required viewing. Search for “Steve Jones” in the panel on the right. You can see the slides in the big panel on the left. The video comes up above the search panel.
But it is very funny! Creationist clip explaining how peanut butter disproves evolution. Honest!
Two sites which provide extremely useful overviews of the evidence for evolution, and arguments against creationism:
Two highly readable articles from my pal Jerry Coyne:
This from edge.org and this from The Guardian