While it is not 100 percent certain that Hipparchus is the source of this star map, some of the evidence of his authorship includes the precision of the ancient astronomer’s measurements.

About 2,500 years ago Greece was one of the most important places in the ancient world. The Greeks were great thinkers, warriors, writers, actors, athletes, artists, architects and politicians.

THESSALONIKI, Greece — Greece’s second largest city ... “This project offers a remarkable blend of the ancient and modern, integrating archaeological heritage with metro infrastructure ...

Greece’s second-largest city ... decades of construction—which was repeatedly interrupted by discoveries of ancient artifacts and structures. Many of those items ended up staying underground ...