Archaeological evidence indicates that Cobá was first settled between 100 BC and 100 AD. At that time, there was a town with buildings of wood and palm fronts and flat platforms. The only archeological evidence of the time are fragments of pottery.
A "tumi," a ceremonial knife made of copper alloy, is presented in Ferrenafe, Peru on Tuesday. Archaeologists in northern Peru say the artifacts found next to a pyramid in northern Peru include the first pre-Inca tumi knives ever excavated scientifically.