The first image of a black hole captured four years ago revealed a fuzzy, fiery doughnut-shaped object. Now, researchers have used artificial intelligence to give that cosmic beauty shot a touch-up.

The updated picture, published Thursday in the Astrophysical Journal Letters, keeps the original shape, but with a skinnier ring and a sharper resolution.

A large asteroid will safely zoom between Earth and the Moon on Saturday, a once-in-a-decade event that will be used as a training exercise for planetary defence efforts, according to the European Space Agency.

The asteroid, named 2023 DZ2, is estimated to be 40 to 70 meters (130 to 230 feet) wide, roughly the size of the Parthenon, and big enough to wipe out a large city if it hit our planet.

Our capacity to care about others may have very, very ancient origins, a new study suggests.

It might have been deep-rooted in prehistoric animals that lived millions of years ago, before fish and mammals like us diverged on the tree of life, according to researchers who published their study Thursday in the journal Science.

Genetic material collected at a Chinese market near where the first human cases of COVID-19 were identified show raccoon dog DNA comingled with the virus, adding evidence to the theory that the virus originated from animals, not from a lab, international experts say.

"These data do not provide a definitive answer to how the pandemic began, but every piece of data is important to moving us closer to that answer," World Health Organization Director-General Tedros Adhanom Ghebreyesus said Friday.

The second astronaut from the United Arab Emirates is still adjusting to life off the planet, after rocketing to the International Space Station last week.

"I'm still coping. I'm still learning," Sultan al-Neyadi said, but added that he hopes to improve in the coming days.

A new crew arrived at the International Space Station on Friday for a six-month mission, after overcoming trouble with one of the capsule's docking hooks.

The SpaceX capsule and its four astronauts had to wait 65 feet (20 meters) from the orbiting lab, as flight controllers in California scrambled to come up with a software fix.

SpaceX launched four astronauts to the International Space Station for NASA on Thursday, including the first person from the Arab world going up for an extended monthslong stay.

The Falcon rocket bolted from Kennedy Space Center shortly after midnight, illuminating the night sky as it headed up the East Coast.

A crucial question has eluded governments and health agencies around the world since the COVID-19 pandemic began: Did the virus originate in animals or leak from a Chinese lab?

Now, the U.S. Department of Energy has assessed with "low confidence" in that it began with a lab leak, according to a person familiar with the report who wasn't authorized to discuss it. The report has not been made public.

Russia launched a rescue ship on Friday for two cosmonauts and a NASA astronaut whose original ride home sprang a dangerous leak while parked at the International Space Station.

The new, empty Soyuz capsule should arrive at the orbiting lab on Sunday.

Conspiracy theories about a U.S. research station have resurged, with social media users falsely blaming it for the Turkey-Syria earthquakes, following debunked claims it causes weather disasters and spreads the coronavirus.