This is the stunning moment a tourist dropped a rock into a pond, creating mesmerising ripple reflections on a rock face. Footage shows the holidaymaker tossing the stone into the still water, sending ...

Across the cosmos, many stars can be found in pairs, gracefully circling one another. Yet one of the most dramatic pairings ...

In 2015, a piece of equipment at an observatory in the US moved one quintillionth (10-18) of a meter. This tiny movement was ...