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Haha, you rube. They used helium.

Supposedly the Egyptians did know how to make a simple battery. Mythbusters reproduced the battery and it produced around 4 volts. It only takes 1.5 volts to produce hydrogen gas from water via electrolysis. It's technically within the scientific capability of the Egyptians to do this, although I don't think it likely.

Sounds Like a bunch of hot air to me...

I will note there is historic precedent for using gut, not hide, for lifting gas envelopes. Airship R101 had gut gas bags.

Not just air-tight, lighter-than-air-tight. I'm not sure if it's true for the whole set of lighter-than-air gasses, but helium is infamously difficult to keep from leaking, even with modern technology.

Good at making gasses behave is a weird choice for ancient technologies we lost.

Do they need to do that before, or after they learn how to harness a tremendous amount of hydrogen? Which they conveniently forgot to mention anywhere.

You also think that they would have made a few pictures of that happening, instead of the pictures they did make, which clearly show manual slave labor building the pyramids.

i think they would likely be using intestines or cow stomachs as did the rigid airships of the time, as it was the only material that could hold back hydrogen, so that would've been an option. Especially with leather production, though someone would have to have thought about it first.

I'm not sure either hydrogegn OR helium would've been accessible at the time, though if we're tying to logically analyze this, its probably worth considering they would've alleviated like 80% the mass of the stone, and not all of it, as it's a little redundant to make the thing float.

Hah gain even more lifting power and also sidestep the whole need of creating helium by filling it with vacuum!

\s if needed 🤷🏻‍♀️

Such experiments have been done before. Not in Egypt, as far as I know, but it was shown through demonstration that the Nazcans, who drew the famous shapes in the Peruvian desert you can only see clearly from above, had all of the materials to build a functional hot air balloon.

The problem is that there's absolutely no evidence they ever did such a thing.

https://www.hallofmaat.com/americas/grounding-the-nasca-balloon/

Also, if you're making a picture for a god, it doesn't really matter if you can't see it.

In case this is of interest to you, since 1997, a group of archaeologists and experts have been building a castle in France as accurately as they can in the way it was done in the 13th century. Apart from adding certain things for safety reasons, they try to be as authentic as possible. Of course, it's taken decades and it's still not done... but that's because it's a freakin' castle. (Also, they don't have a huge workforce, but that's something else.)

It's even had a practical use. They were able to apply what they learned when reconstructing Notre Dame after the fire.

https://en.wikipedia.org/wiki/Gu%C3%A9delon_Castle

There was also a British documentary series about it with three archaeologists from Britain who go to contribute to the project and live in a Medieval style- https://www.youtube.com/watch?v=ydoRAbpWfCU&list=PL72jhKwankOiwI5zt6lC3eQtsQDxOaN_g

I find that the general trend is that if they were white, people say "wow, people can do amazing things!" like with Stone Henge, but when they weren't white, it would have been impossible and there is some missing fact like aliens or whatever.

What's amazing to me is that ancient people looked at what they were being asked to build, and the tools they were expected to build it wiht, and didn't just say "No, go fuck your hat."

Gotta love how some people alive today cannot comprehend the fact humans have been able to build large structures long before we had things like crains and electricity.

Yeah? You say that but like, uh... where's your proof, man?

You must not be familiar with Graham Hancock. That's kind of his whole schtick- sounding like he knows what he's talking about by sounding erudite but talking absolute garbage.

I've seen one that said they were built with sound

That's how the modern flat earth movement started.

Clearly they used methane.

Crowds of farm labourers during flood season, all lined up just waiting for their turn to fart into the balloon.

You know you can make hydrogen out of water right? You just need high voltage electricity.

*Hydrogen

Can't tell if the parenthetical is sarcasm or just genuinely wrong.