Our ancestors may have lived on continents other than Africa much earlier than scientists previously thought.

Archaeologists recently excavated stone tools in Shangchen, China, that were made about 2.12 million years ago, LiveScience reported Wednesday. While the common theory is that hominins didn't leave Africa until about 1.8 million years ago, the finding would suggest that they were in fact on the move much earlier.

"It suggests a way earlier migration out of Africa than we ever would have imagined," Michael Petraglia, a paleoanthropologist at the Max Planck Institute for the Science of Human History, told LiveScience.

The researchers, from China and the U.K., found quartz stones that nearly look like naturally produced sediment formations. But upon closer inspection, the stones flaked in such a way that suggests they were shaped by human hands. Scientists are still working to determine exactly how old the artifacts are, and to verify that they really are evidence of a human presence in ancient China.

Homo erectus, or even some earlier species of hominin, had to have migrated out of Africa roughly 10,000 generations earlier than scientists thought, the finding suggests. "It really opens all sorts of questions with respect to migrations out of Africa and the ability of these humans to adapt to various ecological circumstances," said Petraglia. Read more at LiveScience. Summer Meza

Rep. Duncan Hunter (R-Calif.) pleaded guilty Tuesday to one count of conspiracy to misuse campaign funds, but he has shown no rush to quit Congress. He has blown off reporters who've asked when he is resigning, and as of Wednesday, Politico reports, he had not met with House Minority Leader Kevin McCarthy (R-Calif.) to discuss his legal situation. "Our patience is not unlimited," a top Democratic leadership aide told Politico. A GOP lawmaker added that Hunter would be given time to "get his affairs in order .... but not forever."

The House Ethics Committee took the first step in nudging Hunter out the door on Thursday, telling him in a letter to stop voting in the House. If he does vote, the top Democrat and Republican on the committee warned Hunter, "you risk subjecting yourself to action by this committee, and by the House, in addition to any other disciplinary action that may be initiated in connection with your criminal conviction."

"In the past, members who have cut plea deals or been convicted of criminal offenses have come under enormous pressure to leave office quickly or face action by their colleagues, including expulsion," Politico reports. "The late Rep. James Traficant (D-Ohio), for instance, was expelled by the House following his conviction on bribery and other corruption charges. Traficant was convicted in April 2002, but then he refused to resign. Following a 'trial' by the House Ethics Committee, Traficant was expelled from the chamber three months later by a 420-1 vote."

Hunter took a plea deal to avoid dozens of federal counts of campaign finance violations for improperly diverting hundreds of thousands of dollars in campaign funds for personal use, including, allegedly, extramarital affairs with lobbyists and congressional staffers. House GOP leaders asked Hunter to give up his committee assignments when he was indicted last year, and when he didn't, they forced his hand. Peter Weber

It was a big day for Michael Orlando Clark Jr., and he wanted all of his kindergarten classmates to be a part of it.

Clark was adopted on Thursday, and his entire class came to the hearing in Grand Rapids, Michigan, filling up the courtroom benches and holding up paper hearts. They introduced themselves to Judge Patricia Gardner and told her how much they loved Clark. As soon as Gardner banged the gavel, making the adoption official, the kids burst into applause.

"We began the school year as a family," Clark's teacher told WZZM. "Family doesn't have to be DNA, because family is support and love." Clark was one of 36 children who were adopted during Kent County's 23rd annual Adoption Day, and he couldn't stop smiling throughout the hearing. After the event, as his father spoke to WZZM about the adoption, he was no longer able to contain his excitement. "I love my daddy," he told the reporter. "I love him so much." Catherine Garcia

A sad milestone was reached this week, with the Ray Pfeifer Foundation reporting that 200 New York City firefighters have now died from "9/11 illness."

The foundation, which provides assistance to 9/11 first responders with medical bills not covered by insurance, said that Dennis Gilhooly, a retired FDNY captain, and Brian Case, a retired firefighter, are the 199th and 200th FDNY deaths related to the attacks on the World Trade Center, CBS News reports.

Toxins were released when the World Trade Center towers collapsed, and more than 50,000 people who were exposed have become sick, CBS News says. Studies have found a high number of deaths from non-Hodgkin's lymphoma and brain malignancies among 9/11 first responders and others who were exposed to the dust cloud after the towers fell. Catherine Garcia

Uber released a startling 84-page review on Thursday outlining how many reports of sexual abuse the ride-hailing service received in 2018.

In the United States, there were 235 reports of rape, 280 reports of attempted rape, 1,560 reports of groping, and 970 reports of unwanted kissing. "Each of these incidents represents an individual who has undergone a horrific trauma," Tony West, Uber's chief legal officer, told NBC News.

Uber says the victims included both drivers and riders, with passengers accused of sexual assault in 45 percent of cases. "We do four million rides a day," West said. "And when you're operating at that kind of scale, thankfully, 99.9 percent of those rides end with absolutely no safety incident whatsoever." Uber said it has enacted stricter background checks for drivers and added more safety features in the app, including a button that lets users call 911. Catherine Garcia

A satellite image captured Thursday shows activity at a rocket launching site that North Korea had previously dismantled, CNN reports.

The image of Sohae Satellite Launching Station, obtained by CNN and analyzed by experts, shows a large shipping container at the facility's test stand, said Jeffrey Lewis, director of the East Asia Nonproliferation Program at the Middlebury Institute. This was the first time analysts have seen this container, he added, and it could indicate that North Korea will soon start conducting engine tests at the site again. These engines would be used to power satellite launchers and intercontinental ballistic missiles, CNN reports.

While at the NATO summit in London on Tuesday, Trump mused that North Korean leader Kim Jong Un "really likes sending rockets up, doesn't he? That's why I call him Rocket Man." Trump also said he has a "good relationship" with Kim, but his remarks still irked Choe Son Hui, North Korea's first vice-foreign minister. According to North Korean state media, Choe declared that "if any language and expressions stoking the atmosphere of confrontation are used once again on purpose at a crucial moment as now, that must really be diagnosed as the relapse of the dotage of a dotard." Catherine Garcia

Several West Virginia Division of Corrections and Rehabilitation employees have been suspended following the leak of a photo showing more than 30 members of a basic training class giving a Nazi salute, WCHS reports.

Basic Training Class #18 was held Oct. 21 through Nov. 27, and WCHS recently obtained a copy of the photo, with blurred faces, from the office of Gov. Jim Justice (R). In a statement released Thursday, Justice said he has ordered "the termination of all those that are found to be involved in this conduct. This will not be tolerated on my watch, within the Division of Corrections and Rehabilitation or within any agency of state government."

Jeff Sandy, the cabinet secretary for the West Virginia Department of Military Affairs and Public Safety, sent a letter on Wednesday to employees of the Division of Corrections and Rehabilitation, condemning the photo. "It is distasteful, hurtful, disturbing, highly insensitive, and completely inappropriate," he said. Sandy also announced that Betsy Jividen, the commissioner of the state Division of Corrections, has directed that all copies of the photo "be destroyed, sent to this office, or otherwise taken out of circulation to keep its harm from spreading." Catherine Garcia