Lab technicians have to control their working conditions to be able to do a good job of cleaning delicate bones with pneumatic tools and stabilizing fragile cracks with glue. It took more than two years - hundreds of hours of work under bright lights - to clean all of the bones of the adult and juvenile skeletons of Jobaria.

In the picture above, paleontologist Jeff Wilson carefully frees the pelvic vertebrae of an adult Jobaria using a dental tool to gently pick away the rock.