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By playing with the physics of wing color, scientists get a glimpse into how butterflies get their colors, and how quickly they can evolve from brown to brilliant.

After years of failed attempts at cleaning up the dead zones, the Chesapeake Bay, once a national disgrace, is teeming with wildlife again. But success is fragile, and it might be even more so now.

What can a city in decline do to make a comeback? In Springfield, Ohio, a new school is trying to turn the tide. But local leaders say keeping young people from moving away is key to economic revival.

Two years after the Defense Department lifted the ban on women serving in combat units, the Army is allowing women to go through the training program for soldiers who aspire to be infantry leaders.

Even as China presses ahead with a military buildup in the South China Sea, the U.S. invited it to take part in the world's largest naval exercise at Pearl Harbor in Hawaii.

Florida has the most choices of any state for students with special needs: public, private, charter and home schooling. Still, some families can't find a good fit.

Florida has the most choices of any state for students with special needs: public, private, charter and home schooling. Still, some families can't find a good fit.

In addition to their six-figure salaries and benefits, the state's 120 lawmakers are compensated for their cost of living and meals when they travel to Sacramento to write and pass bills.

These clinics have long provided health care to low-income patients, and enjoyed expansion under the Affordable Care Act. With repeal looming, the centers' doctors worry about what's next.

Six people spent that time living in a dome on a rocky volcanic plain on the island of Hawaii. The NASA-funded experiment was meant to simulate a long-term settlement on Mars.