The strategy, reminiscent of the Cold War-era Star Wars program, calls for new sensors in space, updated missile interceptors and advanced weapons, including lasers.
Researchers have pinpointed the neurons that give pain its unpleasant edge. By turning these neurons off in mice, the scientists relieved the unpleasantness of pain without numbing sensation.
Whether it's exercise or housework, older Americans who move their bodies regularly may preserve more of their memory and thinking skills, even if they have brain lesions and other signs of dementia.
A mini biosphere was sent up in China's Chang'e-4, which landed on the far side of the moon in early January. Photos show the small, green shoot of a cotton plant in a container aboard the spacecraft.
Creating an exercise habit doesn't mean you have to spend hours sweating on a treadmill. Start small, build up slowly and remember that all movement counts — even vacuuming, if you do it vigorously.