Dunmore Cave is a cave system in County Kilkenny, Ireland, formed over millions of years by glacial meltwater chemically dissolving the permeable lower carboniferous limestone.
Throughout the Middle Ages, a movement led by Norse explorers, traders and warriors from Scandinavia (present-day Denmark, Norway and Sweden), led to the exploration of distant lands in pursuit of wealth and colonisation.
A study led by the University of Massachusetts Amherst and published recently in Science Advances, upends the previously accepted theory on why the Vikings abandoned Greenland.