More than 2,000 years ago, Greek artisans built a compact machine of interlocking gears that could track the heavens with a ...

Astonishing evidence for an ancient form of sophisticated machining into very hard stone can be seen on one of the artifacts ...

Plus: US disease monitoring capabilities are disappearing. This is today's edition of The Download, our weekday newsletter that provides a daily dose of what's going on in the world of technology. An ...