A secure quantum link has been created over a distance of 511 kilometres between two Chinese cities by using a relay in the middle that doesn’t have to be trusted. This could help extend secure ...

Combinatorial optimization problems are problems that arise in everyday situations, involving the puzzle of determining the shortest route that can be taken between multiple points. Researchers have ...

You can measure distance on Google Maps to give you the approximate mileage between any two points (or more) that you place on the map. When using Google Maps on a computer, right-click a spot on the ...

On a clear night at the end of last year, a green dot appeared on the horizon near the Chinese-Myanmar border. “It was like a very bright green star,” says physicist Chao-Yang Lu. Lu, a professor at ...

The longest scheduled passenger train journey in the world stretches from Moscow, Russia to Pyongyang, North Korea, covering an immense distance of 10,267 kilometers (6379 miles) over roughly 206 ...