Footwear appeared 20-30 thousand years ago and revolutionized the human way of life- it became possible to settle new territories without suffering from hot sand, cold snow and sharp stones. Now shoes are getting smarter, giving us new previously unexplored abilities.

It seems familiar to us that the language is based on the word that we convey by sounds or written signs. But there is a huge world of languages in which the words are based on signs and facial expressions- these are sign languages of the deaf.

Dreams of space colonization have occupied minds of humanity for over a century. Huge spaceships, orbital stations and lunar bases have long been familiar features of science fiction books and films. Technology has been reached such a level that many ideas seem like a real possibility.

The name of the country Greenland is a bit misleading; this massive island is not known for its rolling green hills. Quite the contrary more than 80% of its territory is occupied by ice. However this could all change in near future. If all of Greenland’s ice melts, the average level of the world’s oceans would rise by 742 cm.