Follow intrepid explorers and scientists as they go deep into jungles around the world.

PART I: NEW FRONTIERS | PART II: MONSTERS OF THE FOREST | PART III: THE BEAST WITHIN

We all have a picture in our mind’s eye of what Earth’s great jungles look like. But you’ve never seen tropical forests like this before. In “Deep Jungle: New Frontiers,” see the jungle through the eyes of scientists who are using a new generation of high-tech tools to reveal long-hidden secrets.

Travel to Sumatra where researchers Gavin Thurston and Jeremy Holden try to capture on film — for the first time ever — the rare Sumatran tiger in the wild. As the explorers scramble along twisting paths struggling to follow the big cat’s trail, the question becomes: Who is stalking whom?

Explore Central America with bird expert Kimberly Bostwick, who seeks to understand how frenetic manakin birds produce their amazing sounds. Can a special video camera capture movements too fast for the eye to see?

Investigate Madagascar, where, 150 years ago, Charles Darwin predicted the evolution of an unusual moth with a 12-inch-long tongue. In DEEP JUNGLE, researchers stay up all night with a special night vision camera, looking for proof that he was right.

Take a trip to Borneo, where forest scientist Roman Dial proves that you can see the forest for the trees — but only if you climb up 200-foot-tall trees, armed with a special laser measuring stick that helps create a three-dimensional map of the forest.

Finally, journey to the Congo, where elephant researcher Steve Blake tracks forest elephants by satellite. First, Blake must manage to tag an elephant without getting killed.

After this visual voyage, your image of the jungle will be forever changed

Online content for “Deep Jungle” was originally posted in 2005.