The experts made such conclusions after many years of studying the lives of ancient people who lived in the south of modern Poland during the Neolithic. People of that time almost did not eat meat, since basically they preferred to eat plant foods.
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Scientists carefully examined fragments of bones of people and animals living in the Neolithic period. The findings were amazing. The diet of ancient people contained dairy products, barley and wheat.
If they had livestock, then only wool, skin and milk were used. There was no meat in the daily diet of ancient people. Such conclusions were made by researchers, having studied human teeth.
Researchers also found that ancient people were vegetarians for about five millennia. Interestingly, scientists came to similar conclusions who studied the diet of people who lived several thousand years ago in Africa. Ancient Africans ate plants and root vegetables, which were baked at the stake.
Scientists from Stockholm said earlier that water scarcity could turn modern humanity into vegetarians. Animals need more water than grain to produce the same amount of food.
For example, to grow a kilogram of cereals you need from 0.4 to 3 tons of water, and to grow a kilogram of beef you need 15 tons. Thus, lack of water in the future may force people to reconsider their diet in the direction of plant foods.