Scientists believe that Earth’s orbit moved farther from the sun. Summers were too cold to melt ice and snow.

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Along with Earth’s orbit we are also on an angle.A one degree change of the angle could cause the ice ages.In the last 150 million years, there are believed to have been 6 ice ages.Scientists believe the reason Earth’s orbit moved away from the sun is because of particles in space that hit against the atmosphere causing Earth to tilt in a different way by as little as 1 degree.

Scientists now believe that we, as people, will be the reason causing the next ice age rather than natural occurances.
Theories for the cause of Ice Age include Continental Drift Theory,Change in Elevation Theory, Continental and Crustal DisplacementTheories, and other miscellaneous theories.

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