The different yugas

Sat yuga = The age of spirit = Mystics
Treta Yuga = The age of mind = Imagineers
Dwapara Yua = The age of electricity = Engineers
Kali yuga = The age of the physical = Warriors

Millenia ago, if you saw something, and wanted to share it with the group,
You would have to talk/draw/act and somehow convey what you saw.
Today with electrical gadgets like cameras and smartphones,
You could just shoot a video and instantly share it with everyone in the group.
Since the information is in the same medium (of direct vision), you would not need to explain much too.
Also, we can send something like this to 100s or 1000s of people now due to the internet,
Whereas earlier you would have to go one by one or gather the different people together,
And then attempt to convey what you saw.

Drawing from that analogy, in Treta yuga,
We would have zillions of machines made for modulating the mind field,
In the same way our cities today are filled with electrical gadgets constantly modulating the electrical field.
Imagine if a person from 10BC came and visited our cities in 2021.
He would see electrical contraptions everywhere, right!
Similarly if we find ourselves suddenly plopped into Treta yuga,
We would see mind machines everywhere, and the whole landscape may look truly alien.
Then you could easily share an insight, thought, dream, mental idea, concept, plan etc. directly in the same mental format without the need to verbalize.