Paleo people were making flour 32,000 years ago

Hunter-gatherers used this stone as a combination pestle and grinder to make flour from oats and other grains, says Marta Mariotti Lippi, a professor of botany at the University of Florence in Italy.
Hunter-gatherers used this stone as a combination pestle and grinder to make flour from oats and other grains, says Marta Mariotti Lippi, a professor of botany at the University of Florence in Italy.