As conservationists warn that bluefin tuna are near extinction due to overfishing, scientists are using the latest technology to tease out the fishes' migration mysteries and hopefully craft better protections.

Found only on the Asian island, the animals number only about 15,000 and are threatened by logging, plantations, and human settlements, a new satellite study shows.

See a roundup of the week's news: coal mine collapse in Utah, record-breaking battery-operated car, giant sea bloom, and more.

Unprecedented floods, heat waves, snowstorms, and wildfires have afflicted Earth in the first months of 2007, the UN reports.

Estimated at 16 feet (5 meters) tall, the giant marble likeness of Hadrian is among the most exquisite ever found, archaeologists say.

One's pretty, the other not so much. But a new species of shrew and a rare orchid were both discovered by scientists recently in the southwestern Philippines.

See images of the new Phoenix Mars Lander and the evidence for water on the red planet that the mission is designed to pursue.

Take a virtual tour of Rome circa A.D. 320, and compare the city's digital re-creations with modern photos of the real-life monuments.

See a roundup of the week's news and events: Bridge over Mississippi River collapses, new Veil Nebula images released, and more.

It took 1,200 Iranian weavers 18 months to make the soccer-field-size carpet, which will cover the main prayer hall of a mammoth new mosque.

Hungarian miners have uncovered a scientific oddity: an ancient swamp cypress forest that didn't petrify into stone.

See a roundup of the week's news and events: England experiences worst flood in 60 years, Thirty Years' War skeletons unearthed, and more.

Two Egyptian mummies with fake toes could be evidence of the world's earliest known prosthetic aids.

See pictures of clarion angelfish, Indian star tortoises and other animals that were confiscated at Los Angeles airport.

The recently unearthed remains of the prehistoric mammal include a pair of massive tusks, the longest of which stretches 16.4 feet (5 meters) long.