One display pairs a model of Prometheus, a Great Basin bristlecone pine, with a real piece of its trunk. Its cross-section has 4,862 growth rings; because these trees may not form a ring every year in harsh conditions, the tree was estimated at about 4,900 years old. In 1964, geographer Donald R. Currey was studying glacial history near Wheeler Peak and had permission to cut it. Accounts differ about why he took the full tree, but the rings became a record of past climate. Its stump remains at the bristlecone grove, so this small indoor exhibit brings the tree's immense span of time into reach without the high-elevation walk.