Chelsea have completed the British record 105 million pounds ($129.18 million) signing of Benfica midfielder Enzo Fernandez, Portuguese club Benfica confirmed on Wednesday.Chelsea has already spent more in the January transfer window — around $225 million — than every club in the top leagues in Spain, Italy, Germany and France …

Untangling a knot of galaxy clusters. Astronomers have observed a dramatic, continuing collision involving at least three galaxy clusters. Astronomers are using data from the Chandra X-ray Observatory of NASA, the XMM-Newton of the European Space Agency, and three radio telescopes to understand this chaotic spectacle. These collisions and mergers are …

The beaming face of a cute-looking teddy bear appears to have been carved into the surface of our nearest planetary neighbor, waiting for a passing satellite to discover it. And when the Mars Reconnaissance Orbiter passed over last month, carrying aboard the most powerful camera ever to venture into the Solar System, that’s …