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Заброшенный маяк Rubjerg Knude на побережье Северного моря в Дании.
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![](https://photo.tg-me.com/u/cdn4.cdn-telegram.org/file/ArcuFK_oo75udyBn2aHfKksa-q1JKVJ6sDzvyp2JyuifKCnxfeobwYO_-hhaGZ7rLsxI9b-OtkQR5GQUK6r6Xv6ESoKhTezVlAH8NLZyUjPd_TIoxc9BhdbfzrLExiNOdYv1CcrH7_xbdOO2h-O3b8VZNUus2T8eGJuqwOVZa-onTMF26pefY7TLyyHj-fAyXX5hwFDpazsteKY5pq3Uzh_t0HbT7d6eBxVkXORmAaWJrFj0am148AhMZwgoJRDiyZCMoz8dZGspTyZdVmF3IqGr0pQK-d46sLrfTv-Q4ZdcPJbo3mS-cr0ksOmkYz3dqMwfHzpEsBwThpVhx5wcLA.jpg)
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Заброшенный маяк Rubjerg Knude на побережье Северного моря в Дании.
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Bitcoin is built on a distributed digital record called a blockchain. As the name implies, blockchain is a linked body of data, made up of units called blocks that contain information about each and every transaction, including date and time, total value, buyer and seller, and a unique identifying code for each exchange. Entries are strung together in chronological order, creating a digital chain of blocks. “Once a block is added to the blockchain, it becomes accessible to anyone who wishes to view it, acting as a public ledger of cryptocurrency transactions,” says Stacey Harris, consultant for Pelicoin, a network of cryptocurrency ATMs. Blockchain is decentralized, which means it’s not controlled by any one organization. “It’s like a Google Doc that anyone can work on,” says Buchi Okoro, CEO and co-founder of African cryptocurrency exchange Quidax. “Nobody owns it, but anyone who has a link can contribute to it. And as different people update it, your copy also gets updated.”
Telegram has made it easier for its users to communicate, as it has introduced a feature that allows more than 200,000 users in a group chat. However, if the users in a group chat move past 200,000, it changes into "Broadcast Group", but the feature comes with a restriction. Groups with close to 200k members can be converted to a Broadcast Group that allows unlimited members. Only admins can post in Broadcast Groups, but everyone can read along and participate in group Voice Chats," Telegram added.
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