NICOLAS CAGE has agreed to hand over a dinosaur skull from his personal collection to U.S. authorities so it can be taken back to Mongolia where it was originally discovered. The Hollywood actor bought the Tarbosaurus bataar fossil, a species thought to be similar to the Tyrannosaurus, in 2007 from a gallery in Beverly Hills, California for around $276,00. U.S. authorities have been investigating the skull?s origins and have asked to take possession of the item so it can be returned to Mongolia.