Ghostly blue-green in Antarctica’s Mackenzie Bay likely owes its existence to a complicated mix of cold temperatures and changing water pressure.

The ongoing eruption of Russia’s Kizimen Volcano is reshaping the mountain.

Evidence of severe flooding in Madagascar, in the wake of Tropical Cyclone Giovanna, was a sediment plume at the mouth of the Onibe River.

Snow blankets parts of Lebanon and Syria in this natural-color image acquired on February 20, 2012.

Evidence of severe flooding in Madagascar, in the wake of Tropical Cyclone Giovanna, was a sediment plume at the mouth of the Onibe River.

Floods migrated west in New South Wales in February 2012.

After satellites detected a “hotspot” on Tinakula, a tiny island in the South Pacific, a high-resolution image confirmed volcanic activity.

A jury convicted former University of Virginia lacrosse player George Huguely of second-degree murder in the 2010 death of his ex-girlfriend, Yeardley Love.

President Barack Obama on Wednesday signed into law the agreement passed by Congress last week to extend the payroll tax cut and unemployment benefits while preventing a cut in payments to Medicare doctors.

At least 49 people were killed and more than 600 people were injured when a train plowed into a platform at a Buenos Aires station today, state media said.

Mitt Romney and Rick Santorum went after each other in the final debate before primaries in Arizona and Michigan -- and before Super Tuesday. FULL STORY

One student was wounded and another was in custody Wednesday after a shooting at an elementary school in Bremerton, Washington, authorities said.

A self-proclaimed animal rights activist in Ohio has been charged with soliciting a hit man to kill a random person wearing fur, either by shooting the individual or slitting his or her throat.

The grandmother and stepmother of a 9-year-old Alabama girl who died Monday after allegedly being ordered to run around her family's house -- for hours -- as punishment for lying about taking a candy bar have been charged with murder, police said Wednesday.

While stone carvers chisel new pieces to repair damage inflicted on the Washington National Cathedral by an earthquake last August, fundraisers say the cathedral's restoration fund is $18 million short of the repair cost.

An international research cruise off Japan detects radioactivity in sampled seawater and marine organisms, but well within safe levels.

Speculation and messages of support surged in Venezuela Wednesday, a day after President Hugo Chavez announced he would travel to Cuba for surgery.

Abigail Thernstrom says it will be surprising if the Justices are comfortable with declaring affirmative action policy unconstitutional.

A new study comparing chromosomes in humans and rhesus monkeys suggests genetic decay of the male sex chromosome has all but ended.

How the time of day can increase the risk of dying from an irregular heartbeat has been identified by researchers.