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.
The current configuration of the continents and the Earth's axial tilt means that the variations in Earth orbit round the Sun causes phases of warmer and cooler times and Earth's atmosphere and ocean in response to this amplify the heating/cooling effect resulting in an Ice Age cycle.