There are 5 known locations on earth where there exist evidence of an ancient nuclear war . Even the skeltal remains are still radioactive and they are laying where they died. So again, who brought this technology to ancient man. The only ones who we know possesed such technology were the Fallen Angels and Watchers who came to earth 440,000 years ago. They enslaved many human and it’s my belief this is when the Fallen started fighting among themselves which led to nuclear war in the end.
All that is hidden will be made known and nothing will be secret sooner than later. Are you ready to learn your real history and if so just ask. Its all just waiting for the curious to seek out the Lost Mysteries of earth.

real history, mysteries of the earth, secrets, all

Ask specifically about anything you want to know about in the history of earth.

Is the planet larger than we are led to believe?

No

Are there more continents than what we have been taught?

No, obviously we know how many continents are on earth.

Is there a firmament?

Yes, in the sense of space and the universe.
Definition of Firmament :

firmament noun
fir·​ma·​ment | ˈfər-mə-mənt
Definition of firmament
1 : the vault or arch of the sky : HEAVENS
Stars twinkled in the firmament.
2 obsolete : BASIS
3 : the field or sphere of an interest or activity
the international fashion firmament
She's a rising star in the city's artistic firmament.

Is earth a melted circuit board. Did huge buidlings melt after an event? Is it all melted rick brick?

I have no idea what you are trying to convey here. please use correct english or another language please.

I think the question refers to an ancient nuclear event and asking if the event melted buildings. And then also asking if the architecture equates to a giant motherboard?