Researchers have discovered part of the mystery behind the construction of the earliest known temple in human history. The Göbekli Tepe complex in southeastern Anatolia, Turkey, is a 11,500-year-old stone structure that predates Stonehenge, according to a news release. The researchers used a computer algorithm to trace the architectural design, especially three of the complex's monumental round structures, to determine that the pillars were placed in their particular positions on purpose.