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The ELISA test can seek out the presence of hormones or viruses in a matter of minutes, replacing previous cumbersome and time-consuming methods. Co-inventor Eva Engvall, then a young graduate student in Stockholm, gave the test its name.

Cuban leader Fidel Castro announced on Tuesday that he is stepping down as President of Cuba after 49 years in power. At 81, Castro will not seek re-election, and will transfer power to his brother, Raul. Guests discuss how Cubans are reacting to Castro's resignation.

Mayor Suyapa Jaqueline Trejo wanted music education for the youth of Macuelizo and a better quality of life for her town. Her municipality was strapped for cash. So she came up with a novel idea.

President Obama said Saturday he believes the United States should take military action against Syria, in response to last week's deadly chemical weapons attack. But in an about-face, Obama has decided to first seek a vote in Congress authorizing a military strike. It's a gamble. While approval from Congress would strengthen the president's hand, he could also suffer a stinging rebuke from lawmakers, much as British Prime Minister David Cameron did.

Chinese authorities blame the Dalai Lama for recent protests seeking independence for Tibet. But the Dalai Lama said Monday that he does not seek independence for Tibet — only true autonomy.

U.S. Special Counsel Hampton Dellinger has asked the Merit Systems Protection Board to temporarily reinstate six federal employees fired from their jobs and is considering ways to seek relief for others.

President Trump signed an executive order seeking to end gender-affirming medical treatments for children and teenagers under the age of 19.

Observers say the sport for both the men's and women's games is changing, leaving parity and opportunities for new ascending champions.

Prosecutors said James Beeks, who played Judas in a Jesus Christ Superstar production and also works as a Michael Jackson impersonator, can be seen in photos and videos from Jan. 6 wearing the jacket.

The new book Peril — written by Washington Post journalists Bob Woodward and Robert Costa — turns out to be just as much about Joe Biden, and how he got to be Trump's successor.