The Shackleton ill fated expedition in Antarctica comes to mind when we consider the perils of field-work in early Antarctic exploration.

Climatologist Dev Niyogi talks about why a tornado struck downtown Atlanta in 2008, and how to reduce the threat of urban tornadoes.

Greenbaum is president of the Health Effects Institute, an independent research organization heavily funded by the EPA studies greenhouse gases.

Renewable energy may be the ideal, but it doesn't happen overnight. "In the meantime, we must start managing the CO2 emissions from fossil fuel emitting power stations, refineries, steel plants, and so on. And carbon capture and storage is the only technology that allows us to do that," says John Barry.

"There's a very tense, polarizing debate between people who believe big agribusiness and organics are enemies of each other," says Jon Foley, "The world needs both and we need the lessons from both."

Beth Shapiro believes her work provides a valuable perspective into the interactions between the animals and environment of the past.

Christopher Raxworthy is searching for what he calls a 'cryptic' species of chameleons that might revolutionize our understanding of evolution.

The flammulated owl is unusual. It's small. It's secretive. It "coos" instead of "hoots." And it's sensitive to changes in its environment.

EarthSky won a first place award in the Population Institute's 30th Annual Global Media Awards for Excellence in Population Reporting.

Ancient DNA can yield surprising answers to questions about the evolution and relationships between species.