Rock art and pottery shards indicated that the Sahara's inhabitants may have produced milk, cheese, butter and yogurt some 7,000 years ago.
Roberto Ceccacci ©The Archaeological Mission in the Sahara, Sapienza University of Rome
The sandy dunes of the Sahara may seem an unlikely place for a dairy farm, but about 7,000 years ago, herders tended and milked cattle in what is now desolate desert, new research shows.
About 10,000 years ago, the Sahara desert went through a phase called the Holocene African Humid Period. Fossilized bones show that by the sixth millennium B.C. (or about 7,000 years ago), cattle, sheep and goats roamed over green savanna, and rock art depicts cows with full udders. The occasional image even shows milking, said study researcher Julie Dunne, a doctoral student at the University of Bristol. But it's difficult to get a firm date for those images.
By analyzing pottery fragments, Dunne and her colleagues have now shown that these early herders were not only milking their livestock, but also processing that milk into products like yogurt, cheese and butter.
"The most exciting thing about this is that milk is one of the only foodstuffs that gives us carbohydrates, protein and fat," all in one substance, Dunne told LiveScience. "So it was incredibly beneficial for prehistoric people to use milk." [Top 10 Mysteries of the First Humans]
Dunne and her colleagues analyzed tiny fragments of pottery taken from the Takarkori rock shelter, a prehistoric dwelling in the Libyan Sahara. They ground up small pieces of the pottery, conducting chemical analyses to investigate the proteins and fats embedded in the shards. By doing so, the researchers could see what the pots once held.