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The Egyptian military operation to destroy most of the tunnels used to smuggle goods into neighboring Gaza has led to a shortage of cheap fuel and building materials. It also has led to more sewage flowing into the sea. Change is afoot, however, for the first time in six years.

Federal health officials have lifted the pause on use of the Johnson & Johnson vaccine. States can resume distributing it, now with a warning about rare complications involving blood clots.

Researchers are testing exercise in people at high risk for Alzheimer's. The goal of a federally funded study is to learn whether aerobic physical activity can protect the brain.

The advice for avoiding Zika virus: Don't get bitten by mosquitoes in countries where the virus is spreading. So which repellents work — and which don't?

Colorado's food and ag industries have been growing two to four times faster than the state's economy overall. The state's economists are ever more hopeful about cornering the market on ag innovation.

When science cannot explain patients' recoveries, even a doctor who studiously makes decisions based on the medical evidence is forced to rethink his ideas about hope and miracles.

The Doomsday Clock has inched closer to and farther from nuclear Armageddon since the Manhattan Project in 1947. On Thursday, the clock moved closer to Midnight — the closest it has been since 1954.

As more chefs experiment with microorganisms to transform ingredients and create new flavors, fermentation has gone from ancient preservation technique to culinary tool du jour.

As NASA moves away from manned missions, the private sector is taking on the task. Those hoping for a ride are as eager as ever, and space exploration hasn't lost a bit of its luster.

The bomb cyclone has hit the eastern U.S. and already caused many flight cancelations and power outages, with more expected. From Antarctica, where temps can drop to minus 100, Palmer Station Manager Keri Nelson details how people can persevere in extreme weather.