Becky Oskin

A cracking fireball that exploded over Russia last year appears to share an orbit with a huge asteroid discovered in October 2014.

A tiny flower pressed between layers of sandstone for more than 160 million years could be the earliest angiosperm fossil ever found.

Very low levels of radioactive isotopes leaked from Japan's 2011 Fukushima nuclear disaster have been detected along the North American coast for the first time.

Much of western Canada's glacial ice could disappear by the end of the 21st century.

Colorful, spiky and only a few inches long, three new lizard species discovered in the Andes may be the cutest dragon stand-ins on Earth.

The 2011 Japan tsunami released thousands of tons of ozone-destroying chemicals and greenhouse gases into the air.

A new study has shown that although huge floods are rare in human lifetimes, they are responsible for sculpting the steep mountains in Colorado's semiarid landscape.

The California snowpack is at a record low, and the state announced mandatory water restrictions today.

Stunning new global maps of rain and snow pummeling the planet were released by NASA today.

Even though some polar bears are hunting on land more often in areas hit by shrinking Arctic sea ice, a diet of bird eggs and berries can't sustain these huge animals, a new study finds.

The blackpoll warbler migrates more than 1,500 miles (2,400 kilometers) in two or three days, a new tracking study confirms.

Ordinary tampons can detect sewage pollution, a new study shows.

Yawunik kootenayi, a new Cambrian predator with a wicked set of arms under its four-eyed face, reveals that early arthropods were experimentalists.

In West Antarctica, some ice shelves could melt away within a century.

The oddly calm tornado season owes a debt to the weather patterns responsible for the East's cold, snowy spring and the West's warm, dry drought.

Colossal icebergs careening along the Antarctic coastline can shut down the deep, cold currents that help drive ocean circulation.

Pine Island Glacier in West Antarctica flowed about 325 feet (100 meters) between March 3 and March 15, 2015.

The spring snowmelt comes more than two weeks earlier than it did in the 1970s in Wyoming's Wind River Range, a new study finds.

A fingernail-size frog that can morph its skin texture from spiny to smooth in just minutes is the first shape-shifting amphibian ever found, according to a new report.

This year's El Niño may deliver a quiet tornado season.

Stunning lightning storms inside of towering volcanic ash clouds created tiny glass balls.

A rare leatherback turtle stranded on a remote South Carolina beach was released back into the wild today (March 12).

See photos of wildlife experts in South Carolina rescuing a stranded leatherback turtle on March 7, 2015.