African wildlife expert Rob the Ranger observes a lioness and her cubs roaming the Maasai Mara plains in search of adventure.

Why is the female lion in this clip so uptight when a male approaches her cubs? We explain lion family dynamics in detail.

National Geographic's 100 best images of the year ... Safari in South Carolina. Young cubs are a big part of the business; packages for playing and having photos taken with them run from $ ...