The body's cells respond to stress -- toxins, mutations, starvation or other assaults -- by pausing normal functions to focus on conserving energy, repairing damaged components and boosting defenses.

In a first, researchers genetically modified hookworms. It’s a step toward turning the parasites into living pharmacies.

The U.S. military wants troops on the front lines to be able to make their own food — literally. It's trying to develop ways ...