Health & Safety

A settlement once home to hundreds has been unearthed near England's Stonehenge. Archaeologists think the builders of the huge stone circle may have lived in the village. It dates to the same time period.

In literature, albatrosses represent weighty, inescapable burdens. But in real life, the huge seabirds use wind energy to cruise around the planet's oceans. Photographer Frans Lanting and writer Carl Safina report from one of the world's largest albatross colonies.

In literature, albatrosses represent weighty, inescapable burdens. But in real life, the huge seabirds use wind energy to cruise around the planet's oceans. Photographer Frans Lanting and writer Carl Safina report from one of the world's largest albatross colonies.

Running underneath the rolling hills of Tennessee lies a still-mysterious and remote network of caverns. Many of those caves shelter fragile ecosystems, and biologist Jerry Lewis is helping to discover and protect some of those ecosystems from man's destruction.

Running underneath the rolling hills of Tennessee lies a still-mysterious and remote network of caverns. Many of those caves shelter fragile ecosystems, and biologist Jerry Lewis is helping to discover and protect some of those ecosystems from man's destruction.

Conservationist Bruce Beehler is pushing through a wild and previously unexplored jungle in search of a mysterious and poisonous bird native to Papua New Guinea, the pitohui. His only lead and guide is a local shaman, who uses poison from the bird in his rituals.

Conservationist Bruce Beehler is pushing through a wild and previously unexplored jungle in search of a mysterious and poisonous bird native to Papua New Guinea, the pitohui. His only lead and guide is a local shaman, who uses poison from the bird in his rituals.

The Leuser Ecosystem, one of the world's richest yet least-known forest systems, is increasingly threatened by logging and encroachment by a burgeoning population. We fly into the heart of the forest to profile the conservationists trying to keep it pristine for future generations.

The Leuser Ecosystem, one of the world's richest yet least-known forest systems, is increasingly threatened by logging and encroachment by a burgeoning population. We fly into the heart of the forest to profile the conservationists trying to keep it pristine for future generations.

Some scientists believe the orangutan — a Malay word that translates to "man of the forest" — may soon become extinct, wiped out by the humans it so closely resembles. We travel to the Indonesian island of Sumatra to profile competing plans to save the great ape.