Los Angeles and its suburbs are home to 19 million people. It is the only megacity in the world where mountain lions, also known as cougars and pumas, live side-by-side with humans.
Credit: ©Steve Winter/ National Geographic Creative
On Jan. 17, 2016, 60 Minutes aired Bill Whitaker's report "The Mountain Lions of L.A."
Credit: ©Johanna Turner
For 14 years, the National Park Service has been studying the animals.
Credit: National Park Service
Their research has opened a window into the big cats' mysterious world and raised questions about the species' survival amidst freeways and suburban sprawl.
Here, a mountain lion is caught on a home surveillance camera in an area called Cougar Canyon.
Credit: ©Nancy Vandermey & Eric Barkalow
The mountain lion, named P41, has visited the home at least 10 times.
Camera technology has revolutionized the way mountain lions and other wild animals are studied.
Remote cameras are often used to capture the animals in the wild.
Other types of wildlife are also captured -- including this bear.
Here, bear cubs are photographed in Angeles National Forest.
Credit: ©Denis Callet
A male mountain lion is photographed in Angeles National Forest.
Researchers find a feisty, three-and-a-half week old female in the Santa Monica Mountains.
She appears healthy, but given the danger she faces on the edge of civilization, her future is a question mark.
This December 22, 2015, photo shows kitten siblings P46 and P47 at their den in the Santa Monica Mountains.
The National Park Service says biologists recently discovered the two mountain lion kittens in the Santa Monica Mountains west of Los Angeles.
Credit: National Park Service via AP