Researchers have discovered what they believe is the
reason the ancient Mayans suddenly left their densely populated cities on the
Yucatan Peninsula in Latin America hundreds of years ago.
activity caused ecological changes that made the areas where they lived too
arid. Before people came to those areas, the territory is thought to have been a
permanent bog. Leveraging those bogs, they created complex systems of storage
reservoirs, helping the civilization prosper for several centuries. [Full