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Unrelated lineages of electric fish all use the same small set of genes to create their voltage, a genetic search shows. Maybe the same genes could one day power pacemakers, bioengineers suggest.

Drinking too much alcohol is a big factor in deaths of adults under age 65, CDC researchers say, from obvious risks like vehicle accidents to more subtle effects like higher rates of breast cancer.

Pakistan's military is waging an offensive against the Taliban, and the outcome is uncertain. But nearly a half-million civilians have already fled their homes in an area that has few resources.

Several primary elections wrapped up this week. Host Michel Martin speaks with two seasoned political analysts to learn more about the primary results and the races to watch later this year.

Cases of Ebola continue to mount in West Africa in the largest outbreak of the disease ever recorded. Public health officials are concerned the viral disease could spread farther.

Unlike in the rest of the world, more Americans are using the drug, according to a new United Nations report. Marijuana's potency is also on the rise, the report found.

Bits of 50,000-year-old poop have provided scientists with clues into what our early Neanderthal ancestors ate. Rather than subsisting on meat alone, the poop suggests they also ate plants.

The Supreme Court has struck down a Massachusetts law that requires a buffer zone around clinics offering abortion services. Advocacy groups on both sides of the issue offer their reactions.

The Obama administration is backing away from plans to loosen deportation guidelines. On the eve of the one-year anniversary of the Senate's passage of a comprehensive immigration reform bill, reform advocates concede any changes in immigration laws likely won't come until 2017.

The court limited presidential power to make appointments when the Senate isn't in session and narrowed a state's power to have protest-free zones outside abortion clinics. Here are the implications.