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International travel is one reason why the number of measles cases in the U.S. has spiked this year. But the number of people who refuse to get their children vaccinated is a factor, too.

Long before it fueled moviegoers, popcorn helped lay the foundation for the Aztec empire. In our video, we look at popcorn under a microscope, where the rock-hard kernel's fluffy secret is revealed.

The number of landlines grew in about two dozen countries, but their growth was explosive in Cambodia, Cameroon and Kiribati, countries that until recently had poor infrastructure. Still, as expected, cellphone numbers were even more impressive.

Justin Casquejo, 16, scaled scaffolding, took the elevator and then crept past a sleeping guard before climbing a ladder all the way to the top of the antenna.

The state follows Texas and several others who have seen their same-sex marriage prohibitions overturned in court. Michigan's attorney general has said he will appeal the decision.

It's a matchup full of baseball lore: The two teams have met on three previous occasions dating back to 1946. The Series begins Wednesday in Boston.

The U.S. government ran a deficit of $680 billion in the financial year that ended last month — the first time since 2008 the annual shortfall has been under $1 trillion. But as the AP reports, "It's still the fifth-largest deficit of all time."

A 2007 fliers' revolt on Valentine's Day led to stiff fines for airlines that kept passengers waiting too long. Delays still happen, but new technology, better planning make them less inconvenient.

The storm that has caused havoc from Texas to New England is due to move out to sea Friday. But it's still winter: At least a little more snow is expected in many parts of the Northeast over the weekend.

In the hockey gold medal match, the U.S. women are looking to avenge their 2010 loss to Canada. Meanwhile, South Korean figure skater Yuna Kim will try to hold on to her lead after the short program.