The retreat of a Norwegian mountain ice patch, which is melting because of climate change, has revealed a lost Viking-era mountain pass scattered with spectacular" and perfectly preserved artefacts. The pass, at Lendbreen in Norway's mountainous central region, first came to the attention of local archaeologists in 2011, after a woollen tunic was discovered that was later dated to the third or fourth century AD. The ice has retreated significantly in the years since, exposing a wealth of artefacts including knitted mittens, leather shoes and arrows still with their feathers attached. Carbon dating of the finds reveals the pass was in use by farmers and travellers for a thousand years, from the Nordic iron age, around AD200-300, until it fell out of use after the Black Death in the 14th century. The bulk of the finds date from the period around AD1000, during the Viking era, when trade and mobility in the region were at their zenith. Of the hundreds of discoveries exposed by the retreating ice, some are structural, such as ... the remains of a small shelter. Other finds are products that were being transported by ... traders potentially carrying them much further afield, including reindeer pelts and antlers. Among them are delicate wooden items such as a small, wood-turned bit for a lamb or goat and a carved distaff for spinning wool - even a Bronze Age ski. Last summer's melt exposed an item that archaeologists have identified as a snowshoe for horses - "a quite remarkable object in its own right".