Life on the windswept plains of what is now central Ukraine offered little mercy around 18,000 years ago. Trees were scarce.

Researchers explain how nitrate from farming and fish ponds moves through water and pollutes freshwater lakes.

Abstract: The inversion of airborne electromagnetic (AEM) data suffers from severe nonuniqueness in the solution. Bayesian inference provides the means to estimate structural uncertainty with a rich ...

According to a recent poll by Gallup.com, 59% of Americans believe that the amount they pay in income taxes is fair. The survey was based on a sample 1017 American adults. If the pollsters talked to ...