Final answer:
The oldest noodles found were made from foxtail millet and broomcorn millet, highlighting early Chinese innovations in food preparation and millet cultivation.
Step-by-step explanation:
The oldest noodles ever found were unearthed in China at the archaeological site of Lajia, which dates back about 4,000 years. These noodles were made using foxtail millet and broomcorn millet. While the excerpts provided discuss various ancient civilizations and their innovations, none specifically mention the green used for noodle-making. However, archaeologists have deduced that early Chinese civilizations cultivated millet as a staple crop and used it in their daily diet, including noodle production. Since these early noodles were preserved in an overturned bowl buried under ten feet of sediment, they offer direct evidence of food preparation technologies and dietary habits in ancient China.