While U.S. adults have relatively uniform microbe colonies in their guts, adults in Malawi and Amazonia have much more diverse populations. Scientists are still struggling with why that is and what it means.
New York Times "Phys Ed" columnist Gretchen Reynolds has some simple advice for staying healthy: Stand up. Move around. In her new book, The First 20 Minutes, she explains the hazards of a sedentary lifestyle, and details some of the surprisingly simple ways to stay fit.
The Food and Drug Administration is proposing that manufacturers of X-ray machines and CT scanners do more to protect children from radiation exposure. If companies don't take steps to limit X-ray doses, the agency may require a label on their new equipment recommending it not be used on children.
Norovirus particles can fly through the air, land on things like plastic bags and survive there for weeks, according to an investigation of a stomach flu outbreak in Oregon. The researchers say this proves you don't have to have direct contact with someone to get sick.
Kimberly Lankford, personal finance writer for Kiplinger.com and Kiplinger's Personal Finance magazine, talks to David Greene about the shifting market for long-term-care insurance, and if it is still worth buying.
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