Siberian tigers, the largest of all cats, have experienced an almost total population crash during the past century with at least 97% gone.

An examination of the fierce snow leopard and how it became legendary for both its rarity and elusiveness.

An examination of pumas, which are distantly related to lions and much more closely related to cheetahs.

An examination of lions, which are highly social and form prides of up to 35 animals, unlike other cats.

An examination of leopards, which like most big cats, are elusive and need to be virtually invisible to hunt.

An examination of the elusive wild jaguar, which scientists have struggled to get near for many years.