Mars is a lot like Earth in many ways. The signs of water are obvious in the deep valleys. Many have speculated about once vast oceans often centered over the northern part of Mars. Where did the water go? Extensive radar mapping of the middle latitude region of northern Mars shows that thick masses of…

The melting of glaciers is well documented, but when looking at the rate at which they have been retreating, a team of international researchers steps back and says not so fast. Previous studies have largely overestimated mass loss from Alaskan glaciers over the past 40-plus years, according to Erik Schiefer, a Northern Arizona University geographer…

The idea of imposing a broad cap-and-trade system to cut America’s greenhouse gas emissions is dead and will be replaced with a new approach, an influential Republican senator said on Tuesday. Lindsey Graham, one of three senators working against daunting odds to produce a compromise climate bill, has recently turned against imposing the kind of…

The Pliocene epoch is the period in the geologic timescale that extends from 5 million to 2 million years before present. Although scientists know that the early Pliocene had carbon dioxide concentrations similar to those of today, it has remained a mystery what caused the high levels of greenhouse gas and how the Pliocene’s warm…

The British Antarctic Survey (BAS) presents the results of its ongoing census of marine life in the Antarctic at a meeting of the American Association for the Advancement of Science. The BAS census has been documenting the diversity of marine life in Antarctic waters and the way it is changing in response to climate change.

Charles Darwin helped forecast today’s magnitude-8.8 earthquake in Chile, which has, at press time, killed more than 200 people, caused extensive damage, and sent a modest-size tsunami around the Pacific. Seismologists are giving the famed naturalist credit for reporting telltale signs that helped later scientists forecast that the giant temblor—one of the 10 most powerful…

Water levels in the northern Mekong River are at record-low levels, posing a threat to water supply, navigation and irrigation along a stretch of water that is home to millions, a regional official said. Northern Thailand, northern Laos and southern China have all been affected, Jeremy Bird, chief executive officer of the Mekong River Commission…

In Switzerland, two pioneers are coming closer and closer to a flight around the world powered only by solar energy. It doesn’t make good business sense, physics sense, or much of any kind of sense, to try to fly an airplane on solar power. Not yet. With the state of the technology, and how relatively…

When one thinks of plague one thinks of the Black Plague in Europe in the Dark Ages that was spread by rodents. However, plague also affects wildlife. Plague, a flea borne bacterial disease introduced to North America in the late 1800s, spreads rapidly across a landscape, causing devastating effects to wildlife and posing risks to…

The Chile earthquake — at a magnitude of 8.8 — was much stronger than the one that hit Haiti, but casualties and damages appear to be far less. Why? The earthquake that struck Chile was far stronger than the one that struck Haiti in January. But, initial reports show that damage was much more contained.…