Nearly a dozen years since the wolves returned to Yellowstone, the recovery of that system to its natural balance is well underway.

The sycomore fig tree is the center of an entire ecosystem, producing several tons of fruit a year and feeding a greater variety of animals than any other kind of tree in Africa.

The sycomore fig tree and the fig wasp share a curious and important co-dependency.

Located along the riverbanks of southern Kenya, the sycomore fig tree feeds more varieties of animals than any other kind of tree in Africa.

(Airs Sunday, August 30) It may be one of nature's oddest couples: a tiny wasp and a giant fig tree. The wasp and the fig depend on each other for survival.

Figs come in all shapes and sizes. Some are trees, while others are bushes or vines. Some are considered sacred, and some will even strangle other trees to death.

Sudden oak death is caused by a mysterious fungus, and its victims are California's beloved oak trees, the leafy, stout-stalked emblems of the Big Sur coast.

Brazil nut trees are among the giants of South America's Amazon. They tower up to 200 feet high, and they provide habitat and food for numerous forest creatures.

NATURE's "Deep Jungle: Monsters of the Forest" takes you in depth, home to millions of marvelous species, and be treated to a front-row seat to the Amazon.

Marmosets and Tamarins are the world's smallest monkeys. These animals, some never seen before, are the subject of Gremlins: Faces in The Forest.