Here's a good one:
The world's top scientists were holding a meeting. Going over all the incredible scientific advances in the last century, they concluded that with all the power humankind had achieved, they just didn't need God anymore. One of their most distinguished representatives was delegated to break the news to God.
The scientist went to God and said, "God, we no longer require you. Science has progressed to the point where we can do it all on our own."
God said, "Oh? Let's have a man-making contest to see whom needs whom. Whoever creates the best man wins."
"Sure," said the scientist, and bent down to pick up some dirt.
God interrupted: "Let's do this the old-fashioned way. Get your own dirt."