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Scientists revisiting a puzzling sign from the south pole of Mars have urged a brand new potential clarification, and it does not bode nicely for hopes of discovering liquid water on the Purple Planet.
In 2018, scientists utilizing knowledge from the European Area Company’s Mars Express orbiter’s Mars Superior Radar for Subsurface and Ionosphere Sounding (MARSIS) instrument introduced that they’d observed a radar signal that could be interpreted as evidence of liquid water. That sign, a wierd shiny reflection, got here from the Martian south pole in a area referred to as Ultima Scopuli. However researchers investigating the reflection now counsel that the sign did not come from the ice itself, and even from liquid water, however from underlying geological layers manufactured from minerals and frozen carbon dioxide. Specifically, it turned out that the thickness of those layers, somewhat than what they’re manufactured from, creates the otherworldly reflection.
