Darwin's theory of evolution & Intelligent Design. The debate has been going on for quite some time much akin to debate Phoebe & Ross had on Friends.
ID believers have been demanding for missing links. In yesterday's issue of Nature paleontologists have found well-preserved fossils of a previously unknown fish that was on its way to evolving into a four-limbed land-dweller. It had a jaw, fins and scales like a fish, but a skull, neck, ribs and pectoral fin like the earliest limbed animals, called tetrapods. This is a major victory for the theory of evolution.