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Polar bears have been wandering the streets of Arviat in northern Canada more than usual this season. The town has canceled Halloween in fear of unwelcome trick-or-treaters.

Frustrated scientists argued Wednesday that making nasty viruses even worse in the lab provides crucial insight into preventing pandemics. Others say it just ups the risk a lab germ will start one.

All around the country, drivers are seeing signs that gas prices are depressed. Those drops helped hold down the latest consumer price index. But economists worry about too much of a good thing.

Wooden carousels, with hand-carved and painted horses, seem like a relic of the past. But Carousel Works in Mansfield, Ohio, is one of a few companies still making them to order.

The Facebook co-founder and CEO spoke at Tsinghua University in Beijing for about 30 minutes. In Mandarin. His audience liked it.

Is California's severe drought hurting the nutrient content of fruit? No, preliminary data on pomegranates suggest. The fruit may be smaller, but packed with more antioxidants, tests show.

Working as a porter in the mountains is a way out of poverty. But it's a job with great risk. After this month's killer storm, the government is calling for regulations to protect visitors and locals.

Latinos make up 9 percent of the state's population and 2 percent of registered voters, and a new poll shows many are undecided. In Charlotte, Michel Martin learns more about their growing influence.

An independent investigation found that the school's African and Afro-American Studies Department used the "paper classes" to inflate grades for more than 3,000 students, nearly half of them athletes.

The Food and Drug Administration has issued warning letters to companies marketing products claimed to be cures for Ebola. One firm says it will drop such claims — but it's still selling the product.