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Mars has experienced six to twenty ice ages over the past several hundred million years. This is the conclusion geologists have come to based on the analysis of images of lobed alluvial margins, according to the journal Proceedings of the National Academy of Sciences.

Today it is believed that once in the past, a favorable climate could prevail on the Red Planet, and liquid water could exist on its surface. However, such conditions on Mars did not exist for long, and already at the beginning of the Hesperian period, that is, about 3.7 billion years ago, the celestial body turned into a dry, cold desert. Why such a radical change took place remains a matter of debate, as well as how exactly the climate has changed throughout the history of the planet.

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The subpolar regions of Mars are covered with glaciers. Planetologists suggest that these glaciers were formed later, in the modern Amazonian period - that is, not earlier than 3 billion years ago. But how the ice accumulated is not clear.
To determine which hypothesis is correct, Joe Levy of Colgate University and his colleagues analyzed images from the HiRISE camera installed on board the Mars Reconnaissance Orbiter. In particular, the researchers were interested in the lobed alluvial margins.
According to the assumption of geologists, if the stones in them are randomly distributed and have traces of prolonged erosional impact, this may indicate a long, gradual accumulation of ice.

History of space tourism

Space tourism has become increasingly popular in the past two decades. From private companies launching individuals into space to space agencies sending astronauts on missions, …

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