The name of the Sahara Desert dates back to the 1st century AD. It is interesting that in translation from the Arabic language this word is translated exactly as "desert".
The area of the Sahara can be compared to the territories of a state like the United States. True, only 2.5 million people live here, which is approximately 1 person per two square kilometers. People live here near water sources, where there is an opportunity to engage in agriculture and cattle breeding.
On the territory of the state of Chad is the highest point of the Sahara desert - Mount Amy-Kusi. It may seem incredible, but there is snow on the top of the mountain, which is 3, 415 meters above sea level.
Sometimes it happens that snow covers large areas of the desert. For example, in January 2018, snow fell in the southwest of Algeria, and the height of the cover was about 40 centimeters. However, after a couple of hours there was no trace of the snow.
For most people who have never been to the desert, this area seems lifeless. But this is not so: the Sahara is home to about 4, 000 species of animals that have adapted to these harsh conditions. For example, the Ethiopian hedgehog, which can go without food for up to two months.
In addition, the Sahara is rich in minerals. Huge reserves of oil, gas, copper and iron ore, as well as gold, tungsten and uranium were discovered here.
Once the territory of modern Sahara was favorable for life, numerous tribes of pastoralists, farmers and hunters lived here. About 6 thousand years ago, the climate changed and became arid. The population had to leave their homes. Ancient cities that existed many centuries ago are covered with a multi-meter layer of sand.
Several years ago, OXO developed an unusual architectural project - a city that will be housed in a single skyscraper with a height of 450 meters and a total area of about 780, 000 square meters. As conceived by the authors of the project, this huge building will have everything necessary for the life of people - offices and apartments, a library, a museum, gyms and swimming pools and even a garden.
In the city of Tegazi, you can see houses made from salt. Moreover, local residents are not afraid that rains can erode their homes, because precipitation is extremely rare here.
Scientists were able to calculate how much sand is in the Sahara Desert. The result is a figure that is hard to imagine: there are about 3 million buckets for every inhabitant of our planet.
For a long time, it was believed that the territory of the Sahara is continuously expanding. True, the study of images taken from space showed that the area of the desert can both increase and decrease.
The roots of trees growing in the desert go down to a depth of 20 meters. This is the only way to get the water necessary for plant life.
Every year in the Sahara, the Sand Marathon is held - a grueling competition, the participants of which must overcome 243 km on the sands in 6 days. Despite the grueling conditions, the competition attracts hundreds of participants, and the winner receives a prize of $ 4, 500.