The Secret Lives of Big Cats: The Secret Lives of Lions

Big cat populations are shrinking fast, but now we have the means to view them in more detail than ever. Lions differ from all other cats in that they are highly social, forming prides of up to 35 animals. There are now thought to be fewer than 15, 000 lions remaining in Kenya's Masai Mara, a drop of 75% in 50 years.