What happens in the La Brea Tar Pits

We went to this science museum at the La Brea Tar Pits a few years ago. I saw a T-shirt that said “What happens in the La Brea Tar Pits, stays in the La Brea Tar Pits.” Unfortunately, it was a kid’s size. Someone is missing an opportunity! I found the one adult online for $34!! I think not.