A new report in the journal Lancet Infectious Diseases says evidence that the flu shot offers protection in adults aged 65 years or older is lacking. Host John Dankosky and guests discuss the report, the upcoming flu season, and whether seniors should get the flu vaccine.

Reporting in Science Translational Medicine, researchers write that the bacteria in yogurt affect people's digestion--but not by repopulating gut flora. Microbiologist Jeffrey Gordon talks about these findings and the future of using bacteria as therapy for digestive disorders such as diarrhea.

The snakehead fish is invasive, destructive, and, some say, delicious. Maryland chefs, fishermen, and conservationists hope that by putting it on menus, they can eliminate it from regional waterways.

Scientists and conservationists accuse the state environmental agency of editing references to climate change and sea level rise out of a public report — because the agency, like Gov. Rick Perry, is skeptical of global warming.

Increasing U.S. coal exports to China doesn't necessarily mean global emissions will rise. As demand abroad drives up coal prices at home, it could prompt U.S. utilities to switch to cheaper and more environmentally friendly natural gas. And that might alter the politics of climate change in the U.S., an expert says.

A government researcher who wrote a controversial report on dead polar bears was asked to take a polygraph test by a federal agent investigating allegations of scientific misconduct. Some critics of the investigation say it will have a chilling effect on other investigators.

San Francisco has a burgeoning entomophagy (bug eating) movement, and its proponents say bugs have a lot of advantages over meat. They're tasty, not that different from shellfish, and better for the environment.

A nonprofit called Seeding Labs ships surplus scientific lab equipment to universities and research facilities in developing countries. "There are talented people everywhere in the world, but they don't have equal access to the resources to do great science," says the program's founder.