A Marsquake Reveals Why Mars has Two Very Different Hemispheres

Elevation data of Mars featuring the lower elevations of the northern lowlands primarily in blue and the much higher elevations of the southern highlands primarily in orange and red. (Credit: MOLA Science Team)

Even with all we’ve learned about Mars in recent decades, the planet is still mysterious. Most of the mystery revolves around life and whether the planet ever supported any. But the planet teases us with more foundational mysteries, too.

One of those mysteries is the Martian dichotomy: Why are the planet’s northern and southern hemispheres so different?

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