exists and is an alternate of . Technically the longest war ever was the 335 years long, there was no casualties in it or anything but it was officially declared March 30, 1651 and officially ended on April 17, 1986.
Interesting Facts about Ice Ages. 1  The current interglacial period that the Earth is in is called the Holocene period. 2  Most of Canada was covered with ice just 20,000 years ago. 3  An ice age can occur if the global temperature drops just a few degrees for a long period of time.
How Many Ice Ages Were There? There have been at least five major ice ages in the Earthâs past. Outside these ages, the Earth seems to have been ice-free even in high latitudes. Rocks from the earliest well established ice age, called the Huronian, formed around 2.4 to 2.1 Ga (billion years) ago during the early Proterozoic Eon.