What are some ancient civilizations we don't know much about?

There are many ancient civil izations that we don ' t know much about , as much of their history and culture has been lost or destroyed over time . Some examples include : \n \n 1 . The May a civilization in Mes o amer ica , which th rived from around 2 0 0 0 B CE to 1 5 0 0 CE and was known for its advanced knowledge of astr onomy , mathemat ics , and architecture . \n 2 . The Ind us Valley Civil ization , which was located in modern - day Pakistan and north western India and existed from around 2 6 0 0 B CE to 1 9 0 0 B CE . It was known for its well - pl anned cities , advanced san itation systems , and the use of standard ized weights and measures . \n 3 . The S umer ians in Mes op ot am ia , which emerged around 4 5 0 0 B CE and were known for their development of writing , agriculture , and the establishment of the first known legal codes . \n 4 . The M ino an civilization on the island of Cre te , which existed from around 2 7 0 0 B CE to 1 4 5 0 B CE and was known for its vibr ant fres co es , pot tery , and the mysterious Line ar A script . \n 5 . The Ol m ec civilization in Mes o amer ica , which th rived from around 1 2 0 0 B CE to 4 0 0 CE and was known for its large , carved stone heads and advanced knowledge of metall ur gy and agriculture . \n \n These are just a few examples of ancient civil izations that we don ' t know much about . There are many others that have yet to be fully explored and understood by histor ians and archae ologists . </s>