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Turns out that Einstein was right about what happens when neutron stars collide. An international team of astronomers has confirmed his theory for the first time.

Protesters are calling for the end of clerical rule and the removal of Iran's supreme leader, Ayatollah Ali Khamenei. The demonstrations are the biggest since 2009.

In 2017, Fresh Air marked 30 years as a nationally syndicated, daily radio program by doing what it does best: more in-depth interviews.

Hurricanes, fires and even hail contributed to billions of dollars in damages. The government study also finds that it was among the warmest years on record.

Researchers say there's huge potential for harnessing ocean waves to create electricity. The Energy Department is backing one effort in Oregon.

It caused $125 billion in damage, according to a new report from the National Hurricane Center, and broke U.S. rainfall records. At least 68 people died as a result of the storm.

When it was announced in 2007, the prize's organizers said they expected it to be claimed before the original deadline of Dec. 31, 2014. One team raised more than $90 million.

The State Department says that the encounter between a Russian Su-27 fighter and a propeller-driven U.S. Navy EP-3 put the American crew at risk.

The U.S. retailing giant is partnering with Japan's biggest e-commerce company with the aim of advancing in a competitive international market. Walmart has also announced layoffs at its headquarters.

At least 305 people died in the bombing and shooting attack by assailants against a mosque in the Sinai Peninsula during Friday prayers.