The findings, which are published in Nature, have important implications for our understanding of how Mars evolved. Billions of years ago, the planet may have had a thicker atmosphere that allowed liquid water to flow on the surface.
This thicker atmosphere may have been kept in place by a protective magnetic field, like the one Earth has. However, Mars lacks such a field today. Scientists have wondered whether the loss of this magnetic field led to the red planet losing its atmosphere to space over time and becoming the cold, dry desert it is today.
From residual magnetization in the crust, we think that Mars did once have a magnetic field, possibly from a core structure similar to that of Earth. However, scientists think that the core must have cooled and stopped moving at some point in its history.
Do we think the giant 26km tall volcano had something to do with the core cooling completely?
It popped 😭
More likely is the fact that Mars is closer in size and mass to The Moon, rather than The Earth.
Makes one wonder if the only reason we still have a liquid core is the mass injected deep under the mantle during the massive impact that formed the moon probably significantly heated a lot of the mass.
More likely is the simple fact that Mars is closer in size and mass to The Moon, rather than The Earth
Mars is about twice the size of Earth’s Moon which makes it half as volumous as earth. With that in mind it’s not hard to imagine earth absorbing roughly a moons mass worth of hot angry rock would not increase the ambient temp in the core.
Yeah a lot of that impact energy is still retained as heat. Also it’s though the collision that caused the moon was with an object about the size of Mars.
Astrophysics is a hobby. It is not my field but to my understanding it was a Mars ish size object and that’s how we ended up with 2/3 of it folded into Earth and 1/3 plus some of Earths mass ejected into space to coalesce into the moon?
Mind you, I’m basing this off of some graphics I’ve seen and papers I’ve read years ago. Let me know if any of that sounds incorrect cuz I am not an authority.
Saw a short on that the other day. Current understanding is that the Earth’s mantle formed the Moon and Theia formed Earth’s core. Maybe it also brought water to Earth.
A fairly well accepted theory is that the moon’s gravitational pull (tides) do a lot to churn earth’s molten core, that churning adds heat and the mantle is a fantastic insulator. So all together, the moon is probably what’s keeping our liquid core hot. (And in turn, the liquid core is probably what gives us our magnetic field. And the magnetic field is what keeps our atmosphere from blowing out into space. So that’s all pretty important)
That tidal churn effect may also be why we have plate tectonics, which by the way is absolutely necessary to support life as we know it. Without plate tectonics, heavier elements would all sink to the center of the earth, but those churning plates are always bringing a mix of elements back up to the surface. And without some of those heavy elements, carbon based life wouldn’t be possible. Also, technology wouldn’t really be possible either, because if you think those rare earth metals are rare now, just imagine if they weren’t found in earth’s crust at all.
I think we have a lot to thank the moon for, it’s probably the thing that does the most to make Earth a livable planet. Basically, if the Earth is special, the Moon is why.
NASA’s insight mission has discovered that Mars needs women.
This probably kills any chance of terraforming Mars
The lack of a magnetic field was always going to prevent that, Musk was just a moron.
Eh, it’s a problem but my understanding is that atmospheric loss should be quite slow. The challenge of creating an atmosphere in the first place is nearly insurmountable but assuming we’re able to do that, there’s no reason it couldn’t be gradually replenished.
Could an artificial field be created?
It would require more energy than we can produce at the moment.
What if we nuke something?
/s
I mean we were never going to see the result of a complete terraform of Mars to begin with even if it went perfect with theoretical technology. I doubt our great great grandchildren would have seen it either. I was speculating on the long term. Flying colonies on Venus might be the best bet for long term 2nd human planet.
“just give me a few hundred megatons of nuclear weapons and we can restart the core on Mars guys”
- melon husk, probably
