The history of clocks is a remarkable tale of human ingenuity and the pursuit of precision. Explore how ancient civilizations began measuring time and how this led to the creation of the first true ...

A file photo of Mars (main) and an image of a replica of the Zhurong rover (inset). Zhurong may have found evidence of an ancient ocean on Mars.

"Now I know what to make." Expert gardener shares ancient watering technique to save time and money: 'Saves a lot of water' first appeared on The Cool Down.