Wobbly Mars shapes its climate SpaceDaily

Mars undergoes periodic wobbles in its spin and variations in its orbit that, like the Earth, may cause it to endure prolonged Ice Ages or other climate shifts, scientists say. The evidence comes from the latest pictures of the Red Planet’s northern polar ice cap, a thick dome of what is apparently water ice mixed with dust, and which is up to 2.5 kilometers (1.5 miles) thick.