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Some of the biggest human migrations coincided with major changes in climate, according to a new analysis. Researchers say early humans set out in search of climates where more food was available. And some populations stayed put in certain locations because barriers like glaciers blocked their progress.

Lower taxes weren't the only thing that attracted Facebook co-founder Eduardo Saverin when he made his new home in Singapore in May. The World Bank lists Singapore as the easiest place to do business. Increasingly, money and talent are drawn to the city-state's tech sector.

Talks on Iran's nuclear activities appear to be at a halt, but there is action behind the scenes. Iran's public position hasn't changed. But privately, debate is growing over whether the nuclear program is worth the economic pain of harsh banking and oil sanctions that continue to do their work.

The Republican presidential nominee's message: President Obama's economic policies have failed the nation generally and Hispanics specifically. But the challenge Romney faces with Hispanics was illustrated by a new poll that showed him lagging behind Obama.

Until recently, if you ordered Japanese beer, there weren't many to choose from. But the domination by brewers such as Asahi, Sapporo and Kirin is ebbing. And some longtime sake makers are now devoting part of their breweries to beer.

In 1989, Iran's leader issued an edict that sentenced Salman Rushdie to death for writing the novel The Satanic Verses. Rushdie reflects on the fallout from that order — from the years spent in hiding to the alias he created to avoid detection — in a new memoir called Joseph Anton.

Defense Secretary Leon Panetta is in Beijing but the visit is being overshadowed by China's confrontation with Japan over disputed islands. During a meeting with Panetta, China's defense minister said it reserves the right to use force against Japan, though he hopes the dispute can be solved through negotiation.

The trial of the former police chief who ignited one of the worst political scandals in China in decades wrapped up Tuesday. Wang Lijun is accused of trying to defect to the United States, and covering up a murder involving the wife of a powerful Communist Party official.

Unrest in countries around the world makes national as well as international headlines. A central Kentucky lawmaker believes those events have taken some…

"Green on blue" attacks have continued. And today, a suicide bomber killed at least 12 people — a militant group said the attack was to avenge the anti-Islam video Innocence of Muslims. NATO says it is reducing coalition troops' vulnerability.