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Sperm donations from dead men is "ethically permissible," say doctors seeking to tackle the shortage of living donors in the UK.

For the first time at a grand slam, Naomi Osaka has her dad watching on from the players' box during the Australian Open.

• Airports worldwide increase screening• This may explain the spread of new virus

CNN international correspondent David Culver reports from Wuhan, China, the epicenter of the Wuhan coronavirus outbreak, where the city has set up stricter measures to stop the virus from spreading.

Late-night TV hosts Jimmy Fallon, Stephen Colbert, Jimmy Kimmel and Trevor Noah mock the Senate over the rules in the impeachment trial of President Donald Trump.

Extensive water channels built by indigenous Australians thousands of years ago to trap and harvest eels for food have been revealed after wildfires burned away thick vegetation in the state of Victoria.

Following remarks by impeachment manager Rep. Jerry Nadler (D-NY) and White House counsel Pat Cipollone, Chief Justice John Roberts warned both teams about using rhetoric inappropriate for an impeachment trial in the Senate chamber.

Scientists have identified a new coronavirus, which has infected more than three hundred people since the initial outbreak in Wuhan, China. CNN's Kristie Lu Stout reports on the origins of the mysterious SARS-like virus and the scientific race to control it.

The US Centers for Disease Control and Prevention is expected to announce this afternoon that the first case of Wuhan coronavirus has been reported in the United States, in Washington state, a federal source outside the CDC tells CNN.

More than 2 billion years ago, an asteroid slammed into Earth and created a 43-mile wide crater in Western Australia's outback. Now, researchers believe it is the oldest known impact crater, predating others by 200 million years. And it's possible that the impact led to a great thaw as Earth exited a global frozen state.

House Intelligence Committee chairman Adam Schiff (D-CA) denounced President Trump's unwillingness to allow witnesses at his impeachment trial, arguing Acting Chief of Staff Mick Mulvaney, former National Security adviser John Bolton and others should testify, particularly after Trump himself previously said he would allow it.

President Donald Trump's speech in Davos was not what many attendees wanted to hear.

Hillary Clinton blasts Sen. Bernie Sanders in a new documentary, saying "nobody likes him" and declining in an interview with The Hollywood Reporter to say whether she would endorse and campaign for him if he's the Democratic 2020 nominee.

• CNN poll: 51% say Trump should be removed from office

Greta Thunberg took the stage at the World Economic Forum Tuesday to admonish world leaders for doing "basically nothing" to reduce carbon emissions despite evidence of a looming climate catastrophe.

Governments around the world have always struggled to stop the spread of disease, from the deadly swine flu which struck the globe in 2009, to ongoing attempts to rein in Ebola in West Africa.

Road accidents kill around 1.3 million people and injure tens of millions more each year, according to the World Health Organization.

Officials in China are racing to contain the spread of a new coronavirus that has left at least four people dead and sickened almost 300, after it was confirmed the infection can spread between humans.

A year after Emiliano Sala's death in a plane crash, the soccer player's family say they are still seeking answers to the tragedy.

For the third consecutive grand slam, Maria Sharapova has fallen to a first-round defeat. Now serious questions are being asked about her future.

• ANALYSIS: How Trump wins a second term• 8 things to watch at impeachment trial

During a panel hosted by TIME, Greta Thunberg issues a stark warning about the IPCC's best case scenario for avoiding climate catastrophe.

A New Hampshire man killed a coyote with his bare hands Monday after it grabbed his 2-year-old son by his jacket hood and dragged him to the ground.

A South African wedding venue is facing criticism after the owners declined to host a lesbian couple's wedding because of their Christian beliefs.

Actor Russell Crowe's rural New South Wales property, which was scorched by the massive bushfires that have been burning through Australia, underwent a dramatic transformation after recent heavy rains in the area.

Uber has sold another business in Asia.

The National Institutes of Health is working on a vaccine against the new virus that has infected hundreds and killed four in Asia.

• 'Dead wrong': House Dems fire back at Trump filing on impeachment• Conway: MLK would be against impeachment

CNN's Jeff Zeleny reports on the "circular firing squad" of leading Democratic rivals unfolding on multiple fronts.

Buckingham Palace is working to revise its guidance on how Prince Harry and his wife, Meghan Markle, are to be addressed after reports that the Duchess of Sussex's new title made it sound as though she were divorced.

President Donald Trump and his French counterpart have agreed to hold off on escalating a trade war, officials said, avoiding for now a massive new tariff increase on French goods such as wine, cheese and handbags.

A new Chinese coronavirus, a cousin of the SARS virus, has infected more than 200 people since the outbreak began in Wuhan, China, in December. Scientist Leo Poon, who first decoded the virus, thinks it likely started in an animal and spread to humans.

Meng Wanzhou, Huawei's chief financial officer, arrived in a packed courthouse in Vancouver, British Columbia, Monday morning for a hearing that could determine whether she is extradited from Canada to stand trial in the United States on charges of bank fraud and sanctions violations.

Atlanta Hawks forward Chandler Parsons' playing career might be finished after he was "seriously injured" in an accident involving an allegedly drunk driver, his legal team says.

"Yup, life's a tradeoff," Susan Sarandon tells co-star Julia Roberts while smoking weed in the 1998 tearjerker "Step Mom." In the film, Sarandon plays a woman dying of cancer while struggling to accept leaving her kids to the much younger, much hipper woman her ex-husband married.

In an interview from 1998 about the Clinton impeachment, attorney Alan Dershowitz says it "certainly doesn't have to be a crime" to be impeachable. This is opposite of his defense of President Trump over the weekend.

It was the final question during Sen. Cory Booker's interview with The New York Times editorial board: Who has broken his heart?

About 120 million years ago, a "dancing dragon" lived in China's Jehol Province. The discovery of a fossil belonging to the small feathered dinosaur is new to science and helps bridge the gap between dinosaurs and birds.