Bills to tighten voter ID rules have already been introduced in about half the states this year, where Republican lawmakers say the changes are needed to protect the integrity of the vote.

A new study of the dental plaques of three Neanderthals reveals surprising facts about their lives, including what they ate, the diseases that ailed them and how they self-medicated (and smooched).

Some health experts worry about what this trend means for chronic diseases linked to obesity. Others see an upside: Diets often fail, but a healthy body image can lead to healthy outcomes.

From counting steps to hours of sleep, many people are tracking aspects of their lives. Now one company is merging energy saving with the interest in quantifying — making lowering electricity a game.

New research finds eating soy milk, edamame and tofu does not have harmful effects for women with breast cancer, as some have worried. In fact, for some women, soy consumption was tied to longer life.

Researchers who study developing human embryos have long limited their experimentation to lab embryos that are no more than 14 days into development. Some scientists are now pushing that boundary.

Scientists say they've found the remains of tube- and string-like organisms in Canadian rocks that are at least 3.7 billion years old. But findings like these are always controversial.

New research calculates the greenhouse gas emissions involved in making bread, from wheat field to bakery. The vast majority of emissions come from one step in the process: farming.

More than 8 in 10 wildfires are started by people. Researchers say humans are not only causing the vast majority of wildfires, they're extending the normal fire season around the U.S. by three months.

Naltrexone was approved to treat alcohol disorders more than 20 years ago. But many doctors still don't know that when combined with counseling it can help people resist the urge to drink too much.