 Charig also planned exhibitions, notably in the museum's Fossil Mammal Gallery between 1970 and 1988.He retained his fluency in Russian from his Army days and gave classes in conversational Russian for his colleagues.Despite long periods of poor health, Charig made many original scholarly contributions to dinosaur science, including an hypothesis to explain the unusual pelvic structure in plant-eating dinosaurs, which he referred to informally as "the femur-knocking-on-the-pubis problem".