Where else could they come from besides the sky? There is no reason to believe "alien" technology advanced civilization in any tremendous surge.

To me, it makes sense. HOWEVER they ignore one thing that pisses me off.

They seem to believe that our ancient ancestors are dumber than dirt.

The Romans, destroyed what they didn't believe in, along with Christians. I'm sure other cultures did that also. We have absolutely no clue how far along in technology our ancient ancestors were. After all, they built the pyramids (which we really have no clue how they did that).

Unfortunately this genre is festooned with misinformation and speculation due to its popularity and the bandwagon principle.

It may be more fruitful to look at the unexplained structures in the first instance. Probably in the first instance look for academic research on the Nazca lines as a starting point.

Having said that I haven’t looked into them for many years so the science and interpretations may have moved on considerably due to advanced tech now available in archaeology.

As a person with multiple Ethnic backgrounds running through my blood-line and one with an insatiable appetite for knowledge and learning about ancient Cultures, etc, I have to mention that it may just be far more than mere coincidence that ancient Cultures from the Egyptians through to the Mesopotamians, Aztecs, Incas, Mayans, Nth. American Native Tribes and Australian Aboriginal Tribes ALL have Myths/Legends that their "Gods" ( for want of a much better terminology) ALL came down from the Stars and Skies.
Even the Christian bible holds references to biblical figures being either meeting with 'Sky Beings' or having traveled up into the sky (Heavens) either with or to meet with these Sky Beings.
Since thousands of miles and expanses of both land and oceans, let alone the difficulties in traversing such expanses, separated these cultures and communication between them was almost totally unheard of and logically impossible at the times in question, then can these myths/legends be merely discarded with a grain of salt, dismissed out of hand and regarded merely as being coincidental?
And YES, the authors of the bible, Torah, Koran, etc, most certainly 'borrowed' myths and legends from other cultures in the same geographical region as themselves and then set about embellishing such myths, etc, to suit their own means and ends.
A prime example, is the Hebrew ' one God' concept that ONLY arose AFTER the Amenhotep Iv/ Akhenaton - Armana 'experiment' in Egypt around 1,800 or so B.C.E., the Hebrews, so it seems, latched on to the idea and expanded on it since prior to that time they too worshipped a veritable PANTHEON of Deities, e.g. Baal, Ishtar, etc, etc.
The Hindus alone have well 30,000 + Deities and almost ALL are equally claimed to "come from the skies."
As one with what I like to think as a TRULY Open Mind, I see and think that there are no such things as coincidences.

Methinks your friend has been watching too much of the Hysteria Channel!

"I don't know, I don't care, and it doesn't make any difference." Jack Kerouac
As for being concrete, we have no real evidence. However, there is plenty of evidence to indicate the very real possibility that aliens do exist.
That said, with regard to G/gods, they are merely a form of manipulation and power. Control.
And, it worked.

I've seen that you've @Twill gone down the rabbit hole and can't find the exit. Leave the crazy Zecharia Sitchin alone. Anyone who peaked into the UFO phenomenon would understand they ain't using 1970s rocket technology.

I recommend Dr Rita Louise for she makes a compelling case about myth being history.

And to all the people here who don't take Graham Hancock work seriously. You're partially responsible for creating crazy ancient aliens nonsense.

If we are going to go the science fictiony route, I'd say that visitors from the multi-verse are more likely that visitors from other planets in this universe... if we take it there were visitors who were mistaken for gods in the ancient world.

FWIW, I tend to believe in aliens. Just not the earth-visiting god kind. There's a lot of worlds out there. [google.com]

Please keep us posted on what resources you come up with.

Jesus style god is/was made in because of what was spoken. Spoken words with kinetic energy force of intellectual capabilities.

Important to point out translation of origional greek Pnuema into spirit. The Hebrew word ruach is the word of old testiment.

English word spirit often has a connotation of being a ghost. This is where ofter holy ghost and holy spirit is used interchangeably in English. This takes away from the original intentions of meaning when the original Hebrew concept of ruach is being translated into Pnuema in Greek then "word" in English.

Where does spoken words come from? Logos in Greek has to do with thought and word capabilities and that a thought and a spoken word is the same thing.

John 1:1 In the beginning was the (logos)word, the (logos) was with God and was God.

John That which is born from flesh is flesh, and that which is born from The (Pnuema )Spirit is (Pnuema) spirit. John 3:6

Watch the movie Stranger than Fiction (2006) with actor Will Ferrell. Jesus character and Will Ferrell character are very simular because both are controlled by the author. The author in Jesus character is basically what is written in old testiment.

Matthew 5:17 Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfil.

I know of no evidence that remotely supports this. Only elements of conjecture and fantastical interpretations of ancient glyphs or text.

We may be an alien meat farm thats close to harvest too....lol
"God" may be farmer john..lol
Delicacy of the day, human finger hot dogs...
The what "ifs" can be fun..
But nasty ones control for profits.

Belief in gods, it is just age old time control methods of the ignorant subjects.....

Jesus had disappeared for thirty years or so they state!!!

He has been submitted that he was one of those who sat under a tree like buda were he learn his religious philosophy of forgiveness and non violence!!!

It is all fairytale smacked up BS either way you believe!!!

Indiana Jones already covered this. I mean, I'm one of maybe five people who liked that movie, but he DID cover it.

This crap is all over You Tube and has many books about it. Do they have sources? Not really. Just like religious believers they want to know everything and they make it up. Often this is because of how a statue looks or because we cannot fully explain something. It doesn't mean any of it has evidence unless you are willing to believe it in advance.

I might add that we as a people think we came from the stars and we have often even named our cars with star and planet names. It does not mean that our cars came from somewhere else. It is simply a fascination that mankind has.

I would recommend any source that debunks those crazy claims. Try the following:

[forbes.com]

[smithsonianmag.com]

[en.wikipedia.org]

I hope this helps.

It's completely possible. We need to keep an open mind about this. There are sure to be civilizations that flourished here thousands of years ago that we will never know about. So why not?

I do not understand how the Pyramids are evidence for aliens, what landing strips? There is no evidence of any aliens ever being on the Earth. That something is seen as originating in the heavens and then coming to Earth tells us nothing other than they saw something come from the sky. Lots of stuff comes to Earth from the Sky every day. I have been told by another official that I have seen a real UFO, I thought it was a helicopter, I was later told it showed up on a radar and it did some real weird things and that it was classified as a UFO. It left no proof of anything other than a blip on a radar screen back in the early 1960's.

You might like this article:

[cia.gov]

It’s on 10 real released x files from the CIA. There are lots more.

Nothing remotely scientific, no. I researched writing a book with some of these elements once - sociological fiction, but didn’t have time to complete it. I found lots of fun theory, nothing near facts.
But after my Great Aunty and Uncle came back from their flight on concord they were convinced that there was life on other planets

Urban myth

This is an old theory. One of the early proponents is the author Eric Von Doniken(s?) in his book 'Chariots of Fire' 1960s+-. Just as good a theory as any of the religions(IMO) [en.m.wikipedia.org]

Ancient Aliens on the History Channel is good. It sometimes gets wildly speculative, but for the most part it is factual and very convincing.
Some people ignorantly mislabel the entire subject as "fake," but they obviously have never delved into it personally, and have no idea what they're talking about.
P.S. I've just read the rest of the replies, and it just reaffirms my opinion many 'atheists' on this site are simply reactionary non-believers (and/or non-open-minded) about ANYTHING not apparent to their own feeble five senses.
There is plenty of circumstantial (and other) evidence which strongly suggests, if nothing else, our knowledge of our ancient past is woefully incomplete.

This documentary, called, How the Universe Works is great at covering the earliest moments of our universe, what we're made of and where we came from in season 1. Looking forward to season 2. I hope you enjoy this series!

[amazon.com]