By 2065, the Mare Frigoris, also known as the Sea of Cold, was found to contain large quantities of ice. The first deposits were discovered in near surface strata 250 km north of the Plato crater. The search for water had historically been focused in the southern polar region where water was found, but at significant depths making extraction costly. The discovery of water and hydrogen in shallow reserves was critical to the development of the Moon as a place suitable for terraforming and human habitation. A means to convert super-cooled ice to liquid water and carry it to Plato was one of the very earliest projects undertaken on the Moon.