World without sand
• World without sand
Sahara has not always been a huge realm of heat and endless ocean of sand. Only 5000 years ago, it looked like a vast green expanse in which even elephants and lions lived. Today, scientists are trying to understand what has changed, and North Africa as it could look like the Sahara in the past.
5,000 years ago, one of the most arid desert, and one of their places in the world was full of life. Western Sahara desert, it exists today, could enter the list of 12 major water reservoirs.
The French researchers have revealed ancient river channels: they believe that the desert has supported the existence of a huge number of living organisms.
People can not understand the speed at which the climate is changing. Just a couple of thousand years the Sahara has evolved from a hot oasis in the wasteland. It can happen anywhere. - Russell Vin exobiologist.
The first computer simulation of the Sahara took place back in 2013. Then scientists could not believe their same calculations: according to the information received, the constant monsoon rains kept the existence of a vast ecosystem where there was a place for man and fish.
Some researchers believe that the changed climatic situation was the main reason for the migration of people from Central Africa.
The French researchers managed to find even an ancient river system, fueled by high rainfall. Scientists believe that the entire territory of the Sahara crossing the river Tamanrasset, which flows into the Atlantic Ocean in the area of Mauritania.
Tamanrasset could well enter into the list of the longest rivers in the world, surpassing even the Amazon.
This information came as a surprise to the scientific world. Just two years ago, scientists were convinced that the monsoon does not provide enough precipitation to feed such a huge river.
The data were obtained using the Japanese satellite ALOS. Based on new information, the researchers were able to draw a conclusion about the rich plant and animal life that flourished on the territory of the now arid desert.
But things can return to normal. Scientists have found out over the last 200,000 years, this area has changed nine times, that is, after a few thousand years of sugar can again become a huge oasis.