For a long time, no one even knew they were there. They were buried under feet of sand. Now archaeologists have mapped more than 800 Egyptian tombs found near the village of Lisht. The 4,000-year-old necropolis is one of the largest groups of Middle Kingdom tombs in all of Egypt. Most of the tombs were looted before the archaeologists started mapping them. But there’s still a lot of information left to study. The tombs are helping scientists understand the lives of the people who once lived in the ancient city nearby.