View of the mouth of a 67-million-year-old T-Rex skeleton named "TRX-293 TRINITY Tyrannosaurus" is seen during a preview at Koller auction house in Zurich, Switzerland March 29, 2023. This king of dinosaurs is only the third such a creature ever offered at auction, and the first time in Europe and is expected to fetch 5 million to 8 million Swiss francs ($5.44-8.71 million USD) when it goes on sale in Zurich on April 18th. REUTERS/Denis Balibouse