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The human nose may be able to distinguish more than a trillion different odors and fragrances, research hints. If true, our noses are much more discerning with smells than our eyes are with color.

The Obama administration is widening the scope of economic sanctions aimed at Russia. The White House hopes to penalize its annexation of Crimea and discourage any further incursion into Ukraine.

Human Rights Watch is urging Senegal to implement a law criminalizing forced begging. People acting as Islamic teachers have been exploiting thousands of young boys.

As the White House widens sanctions against Vladimir Putin's inner circle, Russia's retaliating with some of its own. Meanwhile, Ukrainians are looking on, concerned about further Russian incursion.

The German government has intervened in a trade deal between a German arms manufacturer and the Russian military.

A Wheel of Fortune contestant guessed a 12-letter phrase in the bonus round Wednesday night with only two letters revealed — and he won $45,000.

As the new government in Kiev was initialing a pact with the European Union on Friday, Russian President Vladimir Putin was signing legislation to complete the annexation of Crimea.

After Prime Minister Recep Tayyip Erdogan moved to shut down the social media service to quiet opposition, the country's president tweeted his objection to the ban.

Twenty-seven-year-old Ibragim Todashev was killed while being questioned by agents in his Orlando home about his friendship with suspected Boston Marathon bomber Tamerlan Tsarnaev.

A Turkish court is trying to ban Twitter, setting off condemnation of the government's increasingly heavy hand and prompting Turks to find a workaround for the social media site.