EXCLUSIVE: I’ve learned that National Geographic Television president Maryanne Culpepper has exited the studio/documentary arm of the National Geographic Society, which produces programing for the National Geographic Channels, including National Geographic Explorer, as well as specials and series for other networks like PBS. Culpepper spent 16 years at NatGeo TV and was named president in April 2011. I hear the change at the top is part of National Geographic Society’s plan to overhaul and modernize its TV operation, expanding its production capabilities.