Science

Avian influenza is ravaging poultry flocks across the Upper Midwest. The virus is "doing things we've never seen it do before," and understanding about transmission is very limited, a scientist says.

Expensive versions of prescription opioids that are tougher to cut, crush and inject are less likely to be abused, legislators hope. But some doctors call the bill well-meant, but ill-advised.

Drug-resistant tuberculosis is a growing problem. It's spread through the air. It can kill you. And it's incredibly difficult to treat. But a program in Peru shows that the disease can be cured.

Genetic sleuthing and comparisons of recently discovered fossils with living snakes point to a "protosnake" ancestor that likely had tiny hind legs and lived about 120 million years ago.

The White House's strategy to reverse dramatic declines in bee numbers calls for the restoration of 7 million acres of bee-friendly habitat. Critics say the plan ignores a key culprit: pesticides.