| − | A [[cold period]] that lasted from about A.D. 1550 to about A.D. 1850 in [[Europe]], [[North America]], and [[Asia]]. This period was marked by rapid expansion of mountain [[glacier]]s, especially in the Alps, Norway, Ireland, and Alaska. There were three maxima, beginning about 1650, about 1770, and 1850, each separated by slight [[warming interval]]s. <ref> [http://earthobservatory.nasa.gov/Library/glossary.php3?mode=all NASA Earth Observatory glossary] </ref> | + | A [[cold period]] that lasted from about A.D. 1550 to about A.D. 1850 in [[Europe]], [[North America]], and [[Asia]]. This was the coldest period in about 1,500 years. There are many records - both scientific and historic that substantiate this. |
| | + | This period was marked by rapid expansion of mountain [[glacier]]s, especially in the Alps, Norway, Ireland, and Alaska. There were three maxima, beginning about 1650, about 1770, and 1850, each separated by slight [[warming interval]]s. <ref> [http://earthobservatory.nasa.gov/Library/glossary.php3?mode=all NASA Earth Observatory glossary] </ref> |