Birds Do It, Bees Do It, Martian Ice Caps Do It

Migration, that is.

Scientists have detected an ancient migration of the Mars ice caps. Because of Mars’ eccentric orbit, winter may last up to five weeks longer at one pole than at the other. As the red planet progresses through the millennia (imagine a top that spins, but also wobbles) longer winters shift to the opposite hemisphere. Over a period of 50,000 years, ice at one pole would evaporate and refreeze on the opposite side of the planet.

The image above is from the HiRISE site, showing layers in the carbon dioxide ice near the Martian south pole.


About catholicsensibility

Todd lives in the Pacific Northwest, serving a Catholic parish as a lay minister.
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One Response to Birds Do It, Bees Do It, Martian Ice Caps Do It

  1. Gavin says:

    The amazing thing is that these universal periods (pole shift on Mars, astronomical alignments, etc) often happen on such HUGE time periods. I mean 50,000 years – human civilization has barely lasted a tenth of that time! And that’s pretty fast compared to the forming of planets, life cycles of stars, and such.

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