A recent study has shaken up our understanding of Mars by uncovering a surprising feature, which is a 160-mile-thick layer of molten silicates at the base of its mantle.
Up until now, our knowledge of the planetās internal structure relied heavily on data from the InSight mission. However, a significant meteorite impact in 2021 challenged our previous assumptions.
This newly identified molten layer has intriguing implications for Marsā evolution and magnetic field, as well as its moon Phobosā orbit.
It also sparks questions about the processes governing planetary development across the universe.
āThe thermal blanketing of Marsās metallic core by the liquid layer at the base of the mantle implies that external sources are necessary to generate the magnetic field recorded in the Martian crust during the first 500-800 million years of its evolution. These sources could be energetic impacts, or core motion generated by gravitational interactions with ancient satellites which have since disappeared, ā explains Henri Samuel from Lāinstitut de Physique du Globe de Paris.
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