The egyptians aka ancient astronots..
The earliest were Plato and Aristotle.
Early Earlier Earliest
Yes. But earliest is also an adjective, the superlative of early (most early). adjective - the earliest time adverb - he arrived earliest
The Incas had the largest empire in early American civilizations.
It is called an ancient artifact, or an artifact.
Earth works, structures or everyday items (including bodies or fires) left behind by these early people.
earliest
earlier, earliest
The comparative of early is earlier, and the superlative is earliest.
The earliest known language of the Hebrews was early Biblical Hebrew (עברית).
archaeology
earlier, earliest