Mars is Earth's next-door neighbor in the solar system - two rocky worlds with differences down to their very core, literally.
and fresh details about dissimilarities between Earth, the third planet from the sun, and Mars, the fourth.
"The deepest regions of Earth and Mars have different compositions - likely a product both of the conditions and processes at work when the planets formed and of the material they are made from," said seismologist Jessica Irving of the University of Bristol in England, lead author of the study published this week in the journalThe study also refined the size of the Martian core, finding it has a diameter of about 2,212-2,249 miles , approximately 12-31 miles smaller than previously...
"Earth's core does this but Mars' core does not - though it used to, billions of years ago. Mars' core likely no longer has the energetic, turbulent motion which is needed to generate such a field," Irving added.
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