Editor’s Note: “This Is Life with Lisa Ling” discovers the fate of hundreds of tigers bred and held captive by the so-called Tiger King. Watch the episode now on CNNgo. All-new episodes air ...

An curved arrow pointing right. Paleontologists have discovered the first saber-toothed tiger paw prints. The fossilized prints date back 50,000 years and were discovered in Argentina. Produced by ...

Indian forestry officials measure tiger paw prints during the first day of a five-day long tiger census at the Mahanada Wildlife Sanctuary, in the outskirts of Siliguri, Dec. 18, 2008. The ...