The Jalankan, India’s ancient water clock, was keeping time around 500 BCE using the flow of water. The West eventually got in on the action, with Ctesibius in ancient Greece refining the concept.

Today, we bring you another focus challenge, in which we invite you to spend uninterrupted time looking at one piece of art. This one is an Indian painting made in the foothills of the Himalayas ...

To read about a 20-foot-tall statue of one of Vishnu's incarnations that was discovered during an archaeological survey, go to " Around the World: India." ...