Rivers began pumping weathered material into the sea about a billion years after Earth formed, suggesting continents may have gotten an early start.
The cleaning project quickly morphed into an archaeological survey after the team found a row of distinctive bricks.
Nearly a century ago, Danish archaeologists traveled to the site of the ancient city of Hama, a region that was occupied for close to 8,000 years. Hama, now in modern-day Syria, was first occupied ...