Olmec heartland Olmec heartland The Olmec heartland is the southern portion of Mexico's Gulf Coast region between the Tuxtla mountains and the Olmec archaeological site of La Venta, extending roughly 80 km (50 mi) inland from the Gulf of Mexico coastline at its deepest. It is today, as it was during the height of the Olmec civilization, a tropical lowland forest environment, crossed by meandering rivers. Most researchers consider the Olmec heartland to be the home of the Olmec culture which became widespread over Mesoamerica from 1400 BCE until roughly 400 BCE. The area is also referred to as Olman or the
Maya numerals and the Long Count calendar predated the Maya, and was possibly the invention of the Olmec. Indeed, many of the earliest Long Count dates were found within the Olmec heartland. However, the Olmec civilization had come to an end by the 4th century BC, several centuries before the earliest known Long Count dates—which suggests that zero was "not" an Olmec discovery. Mayan numerals were added to the Unicode Standard in June, 2018 with the release of version 11.0. The Unicode block for Mayan Numerals is U+1D2E0–U+1D2FF: Maya numerals The Mayan numeral system was the system to represent numbers and calendar