An estimated 3,000 cenotes remain hidden beneath the forest canopy in southern Mexico, many harboring clues about ancient Maya civilization. The team will use drone-mounted LIDAR (light detection ...

Several of Mount Rainier’s glaciers are already gone, experts say, and others aren’t far behind. The News Tribune asked what ...

The Pyramids of Giza sit about 11 miles southwest of downtown Cairo on the Giza Plateau. Hours. The pyramids are open daily from 7 a.m. to 5 p.m. Location.

PHOTO GALLERY: 'Scan Pyramids' identifies thermal anomalies at King Khufu’s Great Pyramid - Multimedia - Ahram Online ...

At the foundation of the pyramid are physiological and safety needs. In the middle, there are social needs, such as love and belonging. At the top are esteem and self-actualization.