One of the hottest and second largest deserts on our planet known as the Sahara Desert, is spread across ten countries in the continent of Africa. Its area exceeds 3,600,000 square miles. However, many are unaware that in the past, the Sahara Desert was not always a vast sandy desert, but rather a time when this area was a vast ocean.

Around every 20,000 years, the Sahara undergoes a transformation from a desert into a grassy savannah. This phenomenon occurs as a result of changes in the Earth's orientation while orbiting the sun. However, why this change happens suddenly? There is no definite answer to this question. Scientists know that around 4,500 to 8,000 years ago, the Sahara experienced a rapid change from a fertile and watery region to a dry and hot desert.

It can be concluded that humans and their livestock have a significant impact. Data from sediment layers and pollen show that every time humans bring their livestock to graze in the Sahara region, changes occur in soil conditions. Although the change from previously moist grassland to desert occurs quickly, this event is still considered a natural change. The more dust accumulates, the faster the process until a drastic change finally occurs.