Brooke Borel says bedbugs were essentially wiped out after World War II thanks to DDT. It's not totally clear why they came back in the past couple of decades. iStockphoto hide caption
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Shigella is a huge problem around the world. The bacteria infect about 100 million people each year and kill about 600,000. CDC/Science Source hide caption
Fuel prices have plummeted this year, but airfares have remained high. The International Air Transport Association estimates that the world's airlines will rake in nearly $20 billion in profits this year. Brennan Linsley/AP hide caption
The Year In Air Travel: Packed Planes And More Perks — For A Price
Airbus' patented design for amphitheater-like seating. Espacenet hide caption
The airline industry is predicting more people will take to the skies this Thanksgiving than in any year since the start of the recession. David Goldman/AP hide caption
Researchers found that passport screeners have an error rate of about 15 percent when they're evaluating whether faces match passport photos. Justin Sullivan/Getty Images hide caption
Anders Kelto's suitcase took its chlorine wipes on a detour to Paris. Anders Kelto/NPR hide caption
Airstream travel trailers bring to mind the golden age of camping. But they're popular in the modern era, too: Airstream's trailer production is at its highest level since the 1970s, and travel trailer sales this year alone are up 33 percent. Courtesy of Airstream hide caption
That ticket might not be worth much if you have to cancel the trip due to a mental health issue. iStockphoto hide caption
You've been there, and you know it doesn't feel good. But an app based on the science of circadian rhythms could help reduce the suffering of jet lag. iStockphoto hide caption
Passengers wait in line at Hartsfield-Jackson International Airport on Thursday. A major snowstorm has delayed flights from Atlanta to New York. David Tulis/AP hide caption
The Butterfly Garden in Terminal 3 is just one of the pleasant diversions at the Changi airport in Singapore. Wong Maye-E/AP hide caption
Passengers wait for a BoltBus to arrive during a light rain, Wednesday, Nov. 27 in New York. A wall of storms packing ice, sleet and rain could upend holiday travel plans as millions of Americans take to the roads, skies and rails for Thanksgiving. Mark Lennihan/AP hide caption