A pyramid-shaped hill on the Greek island of Keros has revealed a complex system of drainage tunnels and metalworking from the 3rd millennium B.C. that was ahead of its time. Researchers from the University of Cambridge worked with members of the Ephorate of the Cyclades and the Cyprus Institute on an Early Bronze Age site called Dhaskalio, according to a new University of Cambridge press release. Rising sea levels have turned Dhaskalio into an island, but a thin land bridge (now underwater) still connects it to Keros, a "not so popular" island, according to the Greek community newspaper, Neos Kosmos. read more Disclaimer: Chances are that this post was requested by an advertiser.