The Sahara Desert contains more water than sand 8/22/2015 • Fredy
The Sahara Desert occupies the 3d place in top 5 of the most spacious deserts after the two polar ones and is the largest sand desert. However, there is less sand and much more water than you can imagine!
175⁰F (80⁰С) is the temperature of the Sahara sand on a summer day. This is one of those rare places where the amount of precipitations (100 mm per year) is several times less than the amount of evaporation (2,500-5,500 mm per year). On the hottest days rain drops disappear before they can reach the ground.
89,963 mi3 (375,000 km3) of fresh water are contained in a huge underground lake under the Sahara (under the territory of Egypt, Libya, Chad and Sudan). This is one of the greatest natural reservoirs in the whole world. For example, Baikal contains only 5,518 mi3 (23,000 km3 ) of fresh water.
5,400 years ago the process of desertization started. Quite a few of rock carvings – petroglyphs – found in the area prove that several thousand years ago the Sahara was a green savanna with a lot of rivers and lakes. Nowadays we can see only dry beds of ancient rivers called wadi. During heavy rains some of them may turn into deep flows just in a couple of hours.
3.5 million mi2 (9 million km2) is the land area of the desert which makes 29.6% of Africa. About 2.5 million people inhabit this territory. As a comparison, the size of China is 3.7 mi3 (9.6 million km2) with the population of almost 1.4 billion people.
Only 20% of the Sahara is covered with sands. The rest is stone deserts (70%) and salt marshes (10%).
An average sand layer in the Sahara is 492 ft (150 m) thick. The tallest dunes sometimes reach the height of the Eiffel Tower in Paris.
If humanity decided to clear the desert of its sand, each of 7.2 billion people living on our planet would have to top up with sand and then empty over 3 million buckets.
Unbelievable: snow falls in Sahara for the first time in almost 40 years 12/30/2016 • Johnny Crepaul
Sahara covered with snow is fantastic and there's nothing more to say. You just need to see this!
The most powerful photos of 2016 1/1/2017 • George Hovater
This collection consists of photos that capture the biggest moments in history. To celebrate the outgoing year and remember all good and bad things it brought us, see the most powerful pictures of 2016.
Fantastical caves full of magical atmosphere 12/28/2016 • shari
There are so many beautiful places on Earth that have been forming for millions of years but found by people not that long ago. Caves are one of them and they are fantastic. Each of them has its unique little world full of magic...You need to see this!
Roman Fedortsov works on a trawler and publishes photos of the most unusual fish his fishing net catches on Twitter! Roman has an impressive collection that consists of rather different fish from all over the world.