Статья рассказывает о причинах обивки дверей кожей или дерматином в СССР. Одной из причин было повышение звуко- и теплоизоляции, другой - желание выделиться. Также обивка могла играть роль чехла и быть более легкозаменяемой. Статья также упоминает проблемы, связанные с обивкой дверей изнутри, и тот факт, что в наши дни некоторые люди все еще обивают двери.

Experience the sounds of the Sahara Desert with its amazing terrain and the 'Singing Dunes'. Listen to the wind carrying sand from dune to dune and the horn used by the nomadic Tuareg and Berber tribes. Relaxation can be achieved through meditation, autogenics, and progressive muscle relaxation. Subscribe for new relaxing nature sounds videos every week.

China has the most internet users with 854 million, followed by India, the United States, and Indonesia. This video presentation shows the top 10 countries with the most internet users from 1990-2016, with a focus on the rise of countries with large populations like China and India. The BRIC markets account for four of the eight countries with more than 100 million internet users. Subscribe to the channel for more data visualizations and rankings.

The number of billionaires in the world has increased by 346, reaching a record total of 2,816 with wealth of $11.2 trillion. Amazon founder Jeff Bezos takes the crown among these billionaires with wealth of $140 billion, followed by Bernard Arnault and Bill Gates with wealth at $107 and $106 billion respectively. The total wealth of the top 10 billionaires was nearly $1 trillion. Hurun said the TMT industry is the main source of wealth for the world's billionaires, generating 18 percent of total wealth. This year's list has 90 billionaires aged 40 or under, up 5 from last year, 54 self-made billionaires and 36 inherited billionaires.