God, aliens and Nick Pope.

[Old Seer]

It's unlikely the pyramids were built by aliens. At 200,000 MPH it would take a minimum of about 20,000 years to travel to the nearest star. That's with the average space craft and the amount of fuel needed to reach that velocity at fuel run-out time. So one can safely assume aliens haven't arrived here. 

[Asmodean]

If they did though, what incentive would a species capable of sci-fi levels of space travel technology have to pile rocks into pointy shapes?

[zorkan]

Maybe it's to point the way back home.
The pyramids are of course a ground map of Orion.
So aliens most likely come from there.

Just one minor flaw in the theory.
They ain't.

https://en.wikipedia.org/wiki/Orion_correlation_theory

[Asmodean]

Another flaw with it is Sci-Fi-effing-levels-of-space-travel-technology. They would have to have far more efficient ways of pointing to their home planet than static, albeit pointy-ish, piles of rock on a rotating body in a dynamic system.

The pyramids don't actually point at anything specific. Well, roughly in a upward direction with reference to the ground, which is interplanetarilly meaningless.

If being too generous by far, one might postulate that they are reference points or landmarks on a map, the map being Earth or Egypt or just the plot of land on which they stand. Still though, far better ways are available to those who have mastered written communication, not to mention bloody interstellar travel. So, if they are landmarks of stellar cartography, their origins are far more primitive than something an interstellar species would reasonably produce.

(I'm trying to use an objective standard for reasonableness. What would a civilisation need to master in order to travel the stars, have the capacity to pile huge quantities of rock upon arrival, then moving on? Does anything within that umbrella of mastery include more efficient communication techniques, therein mapmaking, than building henges, pyramids, round-ish shapes in corn fields or vaguely-face-looking earth formations on the planet surfaces?)

[zorkan]

Is it possible that aliens would leave calling cards to correspond with the technology of the time on earth?
Strange how this seems to recur.
Like for example George Adamski's photo of a flying saucer looks exactly like the technology of the time with the craft held together by rivets. Aliens wouldn't want to scare people, would they?
How could it be that pyramids are found all over the world?
Nick Pope argues that it could only be because aliens had been there, and humans would not have the capability.
Quite likely that aliens holiday in Wiltshire because so many crop circles arise there, amusing themselves in geometry.
Well, at least the speculation keeps the likes of Pope, Bauval and Hancock in business.

[Old Seer]

If they did though, what incentive would a species capable of sci-fi levels of space travel technology have to pile rocks into pointy shapes?

Actually, as I see it, none. When we go back in time one can see religions formed out of the lack of knowledge of nature. It seems religion is an attempt to explain things without knowing/understanding the facts. If extraterrestrials built the pyramids they failed at practical logic.  They exist (as I see it) for no practical purpose other then religious fanaticism. The only purpose I can come up with, they're a protecting burial structure to make it hard to pillage. The only logic one could apply is that a pyramid is ended up with automatically because a solid cubical pile would be impractical, so to keep it standing for millennia one ends up with a pyramidal construction. I would come to the conclusion that aliens from space would have the mental capacity to know better. It would be more likely that they would be non theistic rather than religious and the pyramids would never have been erected.
The pyramids prove religious fallacy based on the belief in an after life prospect that didn't work and still doesn't.  If they could quarry stone to build the thing they didn't take into account that the same quarrying technique could be used to get into the structure, which did happen. So, It looks like extraterrestrials wouldn't   be that ignorant to engage in false funnery.  

[zorkan]

Put another way, where is the evidence that aliens did not have a hand in the building of the pyramids?
They could have helped the Egyptian slaves with their crystals.

https://www.mightyape.co.nz/mn/buy/mighty-ape-the-asmarians-37011787/

Must order a copy.

[Old Seer]

Put another way, where is the evidence that aliens did not have a hand in the building of the pyramids?
They could have helped the Egyptian slaves with their crystals.

https://www.mightyape.co.nz/mn/buy/mighty-ape-the-asmarians-37011787/

Must order a copy.

The evidence is the cosmos itself. There's far to much debris in interstellar travel to ever make to the next star. No spacecraft could travel for 20,000 years without encountering enough debris to destroy it. It can be safely assumed that no one from anywhere could make it here. It's like a person in Montana on a bicycle going grocery shopping in China while every now and then someone throws a rock at you. An acquaintance likens space travel as a ride on the great cosmic sanding belt.   

[billy rubin]

lets send elon musk to mars and see

[Old Seer]

lets send elon musk to mars and see

Mars would be interplanetary, star travel would be interstellar. We are used to traveling as we do, but the conditions we're under are very different than interstellar. That's Musk's goal, to get people to Mars. It looks to me he'll get it done.   

[billy rubin]

for what?

[Old Seer]

for what?

According to him, So if mankind destroy each other to a point of extinction there would be another place the people would carry on. However, that can't work as the problems that cause an extinction would be psychological. The ones on Mars would have to have a changed psychology because the present mental states of the peoples is what would cause it. Merely sending people to Mars wouldn't change their mental states causing the same problems there as here.
But "if" one had the proper psychological information that would avoid extinction on Mars then why not institute that knowledge here, there would be no need to send people there for that reason. 

[billy rubin]

musk has twelve children and a reputation for asking his female employees for sex with the goal of making him more.

his talk of colonizing the universe is just another aspect of his obsession with his own continuity. thats a pretty shallow motivation. and as you point out, the environmental destruction we are imposing on this planet would simply be transferred to the next.

if we took the money we would spend on running away to another planet and instead used it to fix the one we already have, we wouldnt need to be running away in the first place,

[Asmodean]

lets send elon musk to mars and see

The Asmo vehemently seconds this motion.

...Not that He sadistically wants Musk dead or anything of the sort, you see, He would just prefer him on Mars.

[zorkan]

The evidence is the cosmos itself. There's far to much debris in interstellar travel to ever make to the next star. No spacecraft could travel for 20,000 years without encountering enough debris to destroy it. It can be safely assumed that no one from anywhere could make it here. It's like a person in Montana on a bicycle going grocery shopping in China while every now and then someone throws a rock at you. An acquaintance likens space travel as a ride on the great cosmic sanding belt.   

But surely they have deflector shields.