Cyril Koller, CEO of auction house Koller, stands next to the head of the skeleton of a Tyrannosaurus rex named Trinity, during an auction in Zurich, Switzerland on Tuesday, April 18, 2023. The 293 T. rex bones were assembled into a growling posture that measures 11.6 meters long (38 feet long) and 3.9 meters high (12.8 feet high. The skeleton is expected to fetch 5 million to 8 million Swiss francs ($5.6-$8.9 million). (Michael Buholzer/Keystone via AP)