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Humans have a seemingly primal need to understand how we came to be the way we are today. Pieces of our ancient forebears generally are hard to come by, however.

Humans have a seemingly primal need to understand how we came to be the way we are today. Pieces of our ancient forebears generally are hard to come by, however. Scientists working to interpret our evolution often have had to make do with studying a fossil toe bone here or a jaw there

Humans have a seemingly primal need to understand how we came to be the way we are today. Pieces of our ancient forebears generally are hard to come by, however.

The struggle between conscience and refusal, or individual rights vs. that of the community good, goes far back, and is not limited to reproductive choices.

The struggle between conscience and refusal, or individual rights vs. that of the community good, goes far back, and is not limited to reproductive choices

The struggle between conscience and refusal, or individual rights vs. that of the community good, goes far back, and is not limited to reproductive choices

Scientists discover new species all the time--on the order of 15,000 a year. One of the latest additions to the tree of life is a new type of leopard frog

“We open on a lone soldier walking through the desert. The year: 1861. The place: Mars!” [More]

By Virginia Gewin of Nature magazine Hidden in the landscape of the fertile crescent of the Middle East, scientists say, lurk overlooked networks of small settlements that hold vital clues to ancient civilizations.

By Virginia Gewin of Nature magazine Hidden in the landscape of the fertile crescent of the Middle East, scientists say, lurk overlooked networks of small settlements that hold vital clues to ancient civilizations. Beyond the impressive mounds of earth, known as tells in Arabic, that mark lost cities, researchers have found a way to give archaeologists a broader perspective of the ancient landscape.

By Virginia Gewin of Nature magazine Hidden in the landscape of the fertile crescent of the Middle East, scientists say, lurk overlooked networks of small settlements that hold vital clues to ancient civilizations.

Not all fats are created equal. Scientists have known since the 1950s that replacing saturated fats with unsaturated ones can have profound health benefits . Diets that are high in solid fats, such as butter and animal fat, lead to elevated risks of cardiovascular disease and high cholesterol

Everyone knows that we as humans literally owe the air we breathe to the greenery around us. As school children we learned that plants (as well as algae and cyanobacteria) perform the all-important biological "magic trick" known as photosynthesis , which helps generate the atmospheric oxygen we take in with every breath. [More]

University of Texas researchers have developed a sophisticated new mapping tool showing where vulnerability to climate change and violent conflicts intersects throughout the African continent. [More]

Across much of the United States, this has been an unusually mild winter, especially for those living east of the Mississippi. Not a few people have noted that spring seems to have come early this year. Of course, in a meteorological sense that could be true, but in 2012 it will also be true in an astronomical sense as well, because this year spring will make its earliest arrival since the late 19th century: 1896, to be exact