For the first time, a live Pacific barreleye fish—complete with transparent head—has been caught on video. The deep-sea fish's tubular eyes pivot under a clear dome.

With a head like a fighter-plane cockpit, a Pacific barreleye fish shows off its transparent head and barrel-like eyes in the first specimen ever found alive. With video.

Looking like rainbow spikes, heavenly trumpets, or alien communications, light pillars are appearing along with frigid temperatures this winter.

A one-ton toy king, a robotic game of Rock, Paper, Scissors, and a new "green" Antarctic station are among the best of the week's news pictures.

Say howdy to the Hamiguitan hairy-tailed rat (above), the newest member of our mammalian family that is found only on a mountain in the Philippines.

For the first time, a nonhuman species has shown "widespread success" with subtraction—equaling college students in a series of experiments.

A rare quail from the Philippines was photographed for the first time before being sold at a poultry market, experts say.

After having been bitten severely by a shark, a dolphin was rescued Monday off Australia. He has undergone surgery and is expected to make a full recovery.

Scientists are "startled" to find a swimming snail, a creature with mucus nets, and a dagger-headed crustacean, among others, living at both Poles.

A giant artwork in screaming color, a fatally fiery festival, and snowstorms in Scotland are among the eye-popping images in our pick of the week's best news pictures.

During Australia's recent deadly fires, firefighters came upon a burned and dazed female koala—now nicknamed Sam—which eagerly gulped the water they offered.

Valentine's Day is coming, and a lot of people have love on the brain—quite literally, according to new medical technology that reveals the "mechanical" side of romance.

A potentially immortal jellyfish species that can age backward—the Benjamin Button of the deep—is silently invading oceans, swarm by swarm, a recent study says.

A rare tuatara named Henry got a new lease on life when a cancerous tumor was removed from his genitals—resulting in 11 tuatara babies that hatched on Monday.

A centenarian tuatara—a lizard-like New Zealand reptile often called a living dinosaur—became a new father Monday.