A new report of tiny beads of meteor impact glass strewn high in Antarctica's Transantarctic Mountains may expand a debris field to a tenth of Earth's surface – despite no sign of the crater which spewed out the molten rock 800,000 years ago. (Discovery News)
A chunk of Antarctic ice about seven times the size of Manhattan suddenly collapsed, putting an even greater portion of glacial ice at risk, scientists said. (Associated Press)
A new study predicts water circulation in Lake Tahoe is being dramatically altered by global warming, threatening the lake's delicate ecosystem and famed clear waters. (Associated Press)
British researchers rule out a leading theory that a mass extinction 250 million years ago occurred when the oceans became starved of oxygen and rich with sulphide, causing marine life to die out. (Australian Broadcasting Corporation)
A healthy fish population could be the key to ensuring coral reefs survive the impacts of climate change, pollution, overfishing and other threats, as some fish act as "lawnmowers", keeping coral free of kelp and unwanted algae. (BBC News)
Giant flowers found on Australia and New Zealand's sub-Antarctic islands are probably survivors of lush forests that covered Antarctica before the beginning of the last ice age nearly two million years ago, scientists say. (Australian Broadcasting Corporation)
Researchers have found that certain types of algae can help corals withstand higher sea temperatures and prevent them from bleaching. (Australian Broadcasting Corporation)
Spring keeps coming earlier for birds, bees, trees and sneezes, because of global warming. (ABC News)
An explosion atop the long-erupting Kilauea volcano rained gravel-size rocks onto a tourist lookout on March 19. Scientists say that though it appears on the surface an eruption took place inside the half-mile-wide crater, it's unlikely because other indicators of an eruption aren't present. (ABC News)
A pair of lightweight, robotic planes have made the first unmanned flights over Antarctica's icy expanses. In some flights, the machines were fitted with miniaturized instruments to collect data for use in predictive climate models. (BBC News)
A "dry fog" that muted the sun's rays in A.D. 536 and plunged half the world into a famine-inducing chill was triggered by the eruption of a supervolcano, a new study says. (National Geographic News)
Exactly 100 years ago, scientists started studying a penguin colony at Cape Royds, Antarctica. What they've learned since then suggests that climate change will reshuffle life on the planet in complicated ways. (National Public Radio)
Diving instruments suggest that the oceans have not warmed up at all over the past four or five years, which could mean global warming has taken a breather, or it could mean scientists aren't quite understanding what their robots are telling them. (National Public Radio)
A climate model indicates that a 15-day heat wave in Adelaide, South Australia, like one that has just ended, is only likely to happen once in 3,000 years. (Australian Broadcasting Corporation)
The icy ocean around Antarctica is world-renowned for its penguins, but one team of scientists is more concerned about the animals you can't see – and the fate these microscopic creatures may face in a warming world. (National Public Radio)
The standard view of Arctic life is changing after a team led by Russian scientists plunged through the ice around the North Pole to the ocean bottom in twin submersibles. (The New York Times)
The rate at which some of the world's glaciers are melting has more than doubled, data from the United Nations Environment Program has shown. (BBC News)
A computer model has successfully predicted how the bulbous limestone terraces around hot springs develop over time. (New Scientist)
The vast, icy expanse of the South Pole has nurtured its own community. But what kind of people come for months at a time to live at the most difficult place on Earth? (National Public Radio)
Glaciologist Robert Bindschadler braves the crevasses of Antarctica's Pine Island glacier to discover what is happening in the hot spot where a warming ocean meets ice. (New Scientist)
Just three years after the deadly Indian Ocean tsunami, the final two buoys are up and running in an unprecedented 39-buoy tsunami warning system designed to protect U.S. coastal communities from a similar fate. (Discovery News)
Scientists have discovered concentrations of amino acids in two meteorites that are more than 10 times higher than levels previously measured in other similar meteorites, suggesting that the early solar system was far richer in the organic building blocks of life than scientists had thought. (Discovery News)
A soaring expansive corridor of warm air emanating from the Gulf Stream may explain its influence over Europe's weather – a discovery that could improve forecasts. (New Scientist)
A computer model shows that earthquakes happen less often in areas covered by ice caps, but that quakes come back with a vengeance when the ice melts. (New Scientist)
The United Kingdom's summer floods of 2007 were a freak event unrelated to global climate change, according to a report from the Centre for Ecology and Hydrology. (BBC News)
"Tropical glaciers" may sound like an oxymoron, but these unique ice floes – dotted throughout Ecuador, Peru and Bolivia – are being quickly destroyed by global warming, scientists say. (National Public Radio)
Following a winter of weather extremes, weather and climate specialists caution against using a litany of the period's frigid bluster or relative warmth to draw conclusions one way or the other about global warming. (The Christian Science Monitor)
Researchers used data on ocean crust production, ocean sediment build-up and tectonic plate boundaries to create a reconstruction of how the oceans might have looked 80 million years ago. (BBC News)
The Grand Canyon is far older than generally thought, say scientists who found new evidence that the canyon's western half actually began to open at least 17 million years ago, long before the 6-million-year-old eastern half. (ABC News)
The region of the ocean with little plant life, known as "the desert of the sea," is dramatically expanding, and scientists think warmer oceans may be to blame. (National Public Radio)