“Scientific understanding is often a matter of making the right comparisons.” -NASA

The Big Picture: Different but Not Dissimilar

“The similarities are striking. Each planet has roughly the same amount of land surface area. Atmospheric chemistry is relatively similar, at least as Earth is compared to the other planets in the solar system. Both planets have large, sustained polar caps and the current thinking is that they’re both largely made of water ice. The sibling planets also show a similar tilt in their rotational axises, affording each of them strong seasonal variability. The neighbors also present strong historic evidence of changes in climate.

Magnetic Signatures

Mars does not have the same kind of magnetic field as Earth. But evidence collected by the Mars Global Surveyor (MGS) indicates that the planet may have once had a global magnetic field, generated by an internal dynamo. Evidence suggests that the planet’s magnetic field reversed direction, or flipped, several times in its early days as conditions in the mantle and core of the planet changed. But that dynamo faded, leaving only faint traces of its magnetic past locked in the Martian crust.”

Read More@NASA.gov

Proto-earth #3 [Ganymede] is known to have a magnetic field. Mars’ is currently in a dormant state.

Learn More Here:*Original Astronomical Planet Infowars Discovery