[zeugma]

Dust on its solar panels caused the lander to lose power in December of that year

You'd think they'd have come up with a way to dust the panels, they have known about martian dust for decades.

Also, I thought Mars had no magnetic field to speak of. Wouldn't a 'sloshing molten core' generate one?

[Red Badger]

Depends on what is ‘molten’ and how big it is..................

[Bubba_Leroy]

I thought Mars had no magnetic field to speak of. Wouldn't a 'sloshing molten core' generate one?

It depends on how big it is and what it is composed of. Earth is believed to have a solid iron-nickel inner core surrounded by a molten iron-nickel outer core. Mars could have a molten magma core.