Conjoined twins born in Brazil with a fused head and brain have been separated in what doctors described Monday as the most complex surgery of its kind, which they prepared for using virtual reality.

Arthur and Bernardo Lima were born in 2018 in the state of Roraima in northern Brazil as craniopagus twins, an extremely rare condition in which the siblings are fused at the cranium.

A Chinese booster rocket made an uncontrolled return to Earth on Saturday, leading U.S. officials to chide Beijing for not sharing information about the potentially hazardous object's descent.

French satellite operator Eutelsat said on Monday it was in talks with British counterpart OneWeb for a tie-up to create a "global champion" in broadband internet, rivalling U.S. operators such as Elon Musk's Starlink.

Did you catch the supermoon?

There was a full moon Wednesday night, and at the same time, the moon was closer to Earth than usual. That combo is called a supermoon.

The James Webb Space Telescope, the most powerful to be placed in orbit, has revealed the clearest image to date of the early universe, going back 13 billion years, U.S. space agency NASA said Monday.

A satellite the size of a microwave oven successfully broke free from its orbit around Earth on Monday and is headed toward the moon, the latest step in NASA's plan to land astronauts on the lunar surface again.

It's been an unusual journey already for the Capstone satellite. It was launched six days ago from New Zealand's Mahia Peninsula by the company Rocket Lab in one of their small Electron rockets. It will take another four months for the satellite to reach the moon, as it cruises along using minimal energy.

Nearly 20 million lives were saved by COVID-19 vaccines during their first year, but even more deaths could have been prevented if international targets for the shots had been reached, researchers reported Thursday.

On Dec. 8, 2020, a retired shop clerk in England received the first shot in what would become a global vaccination campaign. Over the next 12 months, more than 4.3 billion people around the world lined up for the vaccines.

A study documenting at least 22,000 Israeli overflights in Lebanon’s skies over the past 15 years has revealed the “huge scale and impact of Israeli incursions over Lebanon” as well as the “psychological effect on the country,” British newspaper The Guardian reported on Thursday.

Scientists have discovered the world's largest plant off the Australia coast — a seagrass meadow that has grown by repeatedly cloning itself.

Genetic analysis has revealed that the underwater fields of waving green seagrass are a single organism covering 70 square miles (180 square kilometers) through making copies of itself over 4,500 years.

The Norwegian Academy of Science and Letters has announced the 2022 Kavli Prize Laureates in the fields of astrophysics, nanoscience, and neuroscience. Eleven scientists from six countries, including Lebanon, were honored for their research that has transformed our understanding of the big, the small and the complex.

Lebanese Huda Zoghbi and three other neuroscientists received the 2022 Kavli Prize Laureate in Neuroscience.