Archeologists document first use of maize as food in Mesoamerica: study

A study in Science Advances reveals that prehistoric Americans began consuming maize as a staple food. Researchers analyzed carbon isotopes in skeletons from Belize, showing a dietary shift from wild animals and plants to maize, which eventually constituted 70% of their diet. This transition was accompanied by the development of sedentary farming and genetic changes in maize, leading to larger crops.

What percentage of food did maize consumption increase to in Mesoamerican diets over time?

What changes did human selection and genetic changes lead to in maize crops?