A contrast agent doesn’t make you feel better or treat what’s ailing you. But by making CT scans clearer, contrast might be crucial in helping your doctor make the right diagnosis.

The Democratic National Committee wants to avoid a crush of candidates in TV debates during the presidential primaries. So it set a qualifying threshold: 65,000 donors spread across 20 states.

Democrats have long said the results of the special counsel’s investigation into the Russian attack on the 2016 presidential election should be fully transparent. Now, some Republicans say they agree.

Law enforcement officials, prosecutors and members of Congress are expected to keep up inquiries into the president’s campaign, inauguration, business and other topics.

A jury of seven men and five women, including three black jurors, found the former officer not guilty of murder in a racially charged case.

Officials say the new blaze was extinguished after about an hour. Amid a week of environmental mishaps, the Texas attorney general filed a lawsuit alleging violations of that state’s clean air laws.

Attorney General Dana Nessel reached a settlement with the ACLU. It requires agencies not to discriminate against gay people who want to adopt or foster children referred by the state.

A new report says students who received media literacy training were 18 percent better at identifying false reports than students without the lessons. Girls gained more knowledge than boys.

Special counsel Robert Mueller has completed his investigation into Russian interference in the 2016 presidential election. It is unclear how much of the report will become public.

Special counsel Robert Mueller has been working for nearly two years to uncover how Russia attacked the 2016 presidential election and whether anyone in the U.S. was involved.

Mueller is not recommending any more indictments, a senior Justice Department official said. Members of Congress in both parties are calling for the report to be released.

Opponents of decriminalization say the multi-billion-dollar industry exploits sex workers. But activists and academics say legalization would protect workers and benefit public health.

Police say they have arrested a 17-year-old male for allegedly making threats targeting specific ethnic groups at Virginia’s Charlottesville High School.

Moore, a conservative commentator and former Trump campaign adviser, has joined the president in criticizing the central bank. “The Fed is sucking the oxygen out of the economy,” Moore has said.

White House press secretary Sarah Sanders announced Friday that ISIS’ territorial caliphate has been eliminated in Syria. Even so, its threats remain.

Prime Minister Prayuth Chan-ocha, who ousted an elected government in 2014, is seeking to remain in power. But many analysts say the military has sought to silence opposition voices.

While Sen. Elizabeth Warren may be dominating the policy debate, there is little evidence that voters are rewarding politicians who flesh out their plans over others with strong personal brands.

The president signed an executive order on Thursday conditioning research grants on “compliance with the First Amendment.”

A week after a gunman killed 50 people at two mosques in Christchurch, New Zealand, friends and family have been gathering for funerals and to listen to the Muslim call to prayer.

The president said he was ordering the Treasury Department to withdraw “additional large scale sanctions” against North Korea on the same day Pyongyang quit a liaison office with South Korea.

Several states require doctors who perform medical abortions to tell their patients the procedure can be “reversed” with progesterone. There’s an absence of evidence to support that contention.

European Union leaders gave the country two different deadlines, depending on whether U.K. lawmakers can agree on a path forward. One deadline is in two months; the other in two weeks.

The Trump administration wants to increase transparency in prescription drug pricing. But health economists say the administration’s call to tie prices to what other nations pay might work better.

The information was held in a readable format within the company’s internal data storage systems. Facebook says it “found no evidence to date” of abuse.

The island nation, still reeling from last Friday’s attacks, heard a message of healing amid plans to change gun laws in hopes of preventing future attacks.

Oversight Chairman Elijah Cummings, D-Md., is investigating alleged violations of federal records laws. Jared Kushner’s lawyer disputes some of Cummings’ assertions about what he told the committee.

The decision would allow super PACs to raise money by using a candidate’s name, even if none of the money ends up going to support that candidate.

Pregnant women in prison face difficult circumstances, and data on their pregnancies has been scarce. New research lays the groundwork for addressing this neglected public health issue.

Black students at San Francisco State College walked out in a protest that led to the rise of ethnic studies departments at colleges and universities around the country.

A former top executive for Rupert Murdoch’s News Corp. tells NPR he left his job because of relentlessly harsh depictions of Muslims and immigrants in Murdoch’s media properties, especially Fox News.

From Presidents Ulysses Grant to Richard Nixon to Bill Clinton and Trump, a number of independent investigators have looked into allegations too hot for normal processes.

Postpartum depression hits low-income women especially hard. Will a promising new drug, Zulresso, become affordable and accessible enough to help them?