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The U.S. Census Bureau holds a public meeting of the National Advisory Committee at the agency's headquarters in Suitland, Md.

White House Names Steven Dillingham To Head Census Bureau

The agency has not had permanent leadership since July 2017. If confirmed by the Senate, Steven Dillingham will oversee the 2020 census and inherit six lawsuits challenging a citizenship question.

An autonomous tank is demonstrated in France last month. Leading researchers in artificial intelligence are calling for laws against lethal autonomous weapons. They also pledge not to work on such weapons.

AI Innovators Take Pledge Against Autonomous Killer Weapons

"We will neither participate in nor support the development, manufacture, trade, or use of" artificial intelligence that is used to kill people, leading AI researchers vowed.

Volunteers look at ballots during a hand recount in Palm Beach, Florida. The recount decided the election in favor of the Republican candidates for Senate and governor but election experts warn that similar problems could crop up again in 2020 if the state doesn't address them immediately.

Florida's Recount Is Over, But Worries About A 2020 Election 'Meltdown' Persist

Florida's recount process was marred by accusations of incompetence, antiquated voting technology and even a ballot design issue that some Democrats believe cost them a Senate seat.

The planet Jupiter now has a total of 79 identified moons.

Galileo Would Be Stunned: Jupiter Now Has 79 Moons

Astronomers have found 12 more moons orbiting the planet Jupiter. These moons are all small — just 5 kilometers or less across — and one of them behaves very strangely.

Baby boomers who use marijuana seem to be using it more often than in previous years, a recent survey finds — 5.7 percent of respondents ages 50 to 64 said they'd tried it in the past month. The drug is also gaining popularity among people in their 70s and 80s.

More Older Americans Are Turning To Marijuana

As marijuana gains popularity among people 65 and older, geriatricians call for more research on how it affects elderly patients. Shifts in metabolism as we age can intensify any drug's side effects.

'Sesame Street' has many versions around the world. Above: its new Afghan characters, 6-year-old Zari (left) and her brother, Zeerak.

With $100 Million Grant, Sesame Workshop Reaches Out To Refugee Kids

In January, Sesame Workshop will start creating programs for Syrian kids who've had to flee their homeland. The goal is to help them deal with the "toxic stress" of refugee life.

Aaron Hernandez (81), of the New England Patriots, lost his helmet during this play against the New York Jets in 2011. Hernandez killed himself in 2017, and researchers found that he had had one of the most severe cases of CTE ever seen in someone his age.

Repeated Head Hits, Not Just Concussions, May Lead To A Type Of Chronic Brain Damage

Scientists believe they have solid evidence that repeated direct hits to the head can cause the degenerative brain disease seen in some athletes, even if there are no signs of concussion.

Repeated Head Hits, Not Just Concussions, May Lead To A Type Of Chronic Brain Damage

Scientists believe they have solid evidence that repeated direct hits to the head can cause the degenerative brain disease seen in some athletes, even if there are no signs of concussion.

Climate Paper At Center Of Scientist-Versus-Scientist Legal Dispute

A Stanford University climate scientist has taken the relatively rare step of suing another scientist, arguing that a rebuttal paper critiquing his work amounted to defamation.

Oregon State University oceanographer Jack Barth deploys a glider that will spend weeks at sea collecting data on everything from dissolved oxygen levels to temperature. "When we used to think about hypoxia in the ocean, we think about little areas. But now what we're looking at is...out in the ocean, there's low oxygen...all along the coast," he says.

Coastal Pacific Oxygen Levels Now Plummet Once A Year

Scientists credit the crab and oyster industries with noticing a change in oxygen levels in coastal Pacific waters.

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