sentences:  Archaeological excavations conducted over a period of years in the latter 20th century have revealed evidence of bear, marten, seal and porpoise, but also elucidate mesolithic hunting and gathering technologies through discovery of bone spears, moose antler harpoons and flint.These earliest inhabitants would have crossed the Kalmar Strait from the mainland toward the end of the last Ice Age, before the glacial cap had fully melted, and thus provided an ice bridge.The settlers at Alby are referred to as the Alby People in the archaeological literature, and the Alby mesolithic village is one of the key resources that led to the UNESCO designation of the Stora Alvaret as a World Heritage Site.