A climber rescued earlier this week returned to an Australian mountain Thursday to save his dog, a 143-pound (65-kilogram) bullmastiff.

Australia has seen some extreme weather-related events this week—from unusually foamy ocean water on a New South Wales beach to bushfires in the country's west.

First a python eats an alligator (and explodes), then another swallows a pregnant sheep (but not for long), and yet another ingests an electric blanket. Now this.

A chemical trick has triggered a co-evolutionary arms race between parasitic Alcon blue butterflies and Myrmica rubra ants in Denmark, a new study says.

Lapland's long winter nights can start with 2 p.m. sunsets. When so much darkness gets people down, bright lights can be used as therapy.

A veterinarian in Australia removes four golf balls from a python that mistook them for chicken eggs.

Millions of the tiny creatures are boring into the uninhabited island of Hoboro, and some experts suggest the landmass may be gone within a century.

A wall enclosing a tiger that escaped and killed a teenager on Christmas was shorter than recommended, San Francisco Zoo officials say.

A dozen dolphins stranded on a Tasmanian beach were saved by volunteers who waded through cold ocean water to make the rescue.

A huge explosion that devastated a swath of Siberia a century ago was caused by an asteroid that was much smaller than had previously been believed, according to new research.

As tourism to Finland's Lapland region booms, reindeer farms reap the benefits.

California ground squirrels and rock squirrels chew on sloughed-off snake skin and smear it on their fur to avoid rattlesnakes, a new study says.

A newfound species of spitting cobra is believed to deliver more venom with a single bite than any other cobra on the planet.

"Hyper-auroras" on Jupiter, clues to Mars's watery past, and the destruction of a stellar icon were among the out-of-this world discoveries that ranked as the year's most popular.

Catching the snakes is the tricky part of making snake soup, says a Hong Kong shop owner who's been bitten by a king cobra.