Dippy is turning 125 this year, and the Carnegie Museum of Natural History is hosting a slate of festivities to celebrate the beloved dino. Thursday, July 18 is Teen Night: Dippy 125, where teens ages 13-18 are invited to a free night full of dinosaur-themed activities, snacks in the teens-only lounge, and learning what made Dippy such an important discovery. Tickets must be registered in advance, as capacity is limited.