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    <title>L4 News — Blockchain</title>
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    <description>How distributed ledgers reach agreement, what a block contains, when a transaction becomes final, and which guarantees a chain does not provide.</description>
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      <title>What is a smart contract, and how does it actually work?</title>
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      <description><![CDATA[A plain-English look at the code that runs itself on a blockchain — and why that automation cuts both ways.]]></description>
      <pubDate>Wed, 12 Aug 2026 08:44:32 GMT</pubDate>
      <dc:creator>Tomás Ferreira</dc:creator>
      <category>Blockchain</category>
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      <title>Public vs private blockchains, explained</title>
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      <description><![CDATA[Public vs private blockchain access: who may read, verify and join — and what each design trades away, with real users of both.]]></description>
      <pubDate>Thu, 23 Jul 2026 12:00:00 GMT</pubDate>
      <dc:creator>Tomás Ferreira</dc:creator>
      <category>Blockchain</category>
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      <title>Layer 1 vs Layer 2, explained</title>
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      <description><![CDATA[Layer 1 is the base chain where transactions settle; Layer 2 is a network built on top of it. The Layer 1 vs Layer 2 distinction, without jargon.]]></description>
      <pubDate>Tue, 30 Jun 2026 12:00:00 GMT</pubDate>
      <dc:creator>Tomás Ferreira</dc:creator>
      <category>Blockchain</category>
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      <title>What is a blockchain node?</title>
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      <description><![CDATA[A blockchain node is any computer keeping and checking a copy of the shared record. Who runs nodes, why they matter and what happens when there are few.]]></description>
      <pubDate>Sun, 07 Jun 2026 12:00:00 GMT</pubDate>
      <dc:creator>Tomás Ferreira</dc:creator>
      <category>Blockchain</category>
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      <title>Hard forks vs soft forks, explained</title>
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      <description><![CDATA[The hard fork vs soft fork difference is compatibility: one splits a chain in two, the other tightens rules old software accepts. Real examples inside.]]></description>
      <pubDate>Sat, 16 May 2026 12:00:00 GMT</pubDate>
      <dc:creator>Tomás Ferreira</dc:creator>
      <category>Blockchain</category>
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      <title>What is the Bitcoin halving?</title>
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      <description><![CDATA[The Bitcoin halving cuts the block reward from 3.125 to 1.5625 BTC around 2028. Here is why the schedule is predictable — and what it does not tell you.]]></description>
      <pubDate>Thu, 23 Apr 2026 12:00:00 GMT</pubDate>
      <dc:creator>Jacob Hoffman</dc:creator>
      <category>Blockchain</category>
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      <title>What is a 51% attack?</title>
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      <description><![CDATA[A 51% attack lets a majority holder rewrite recent blockchain history and double-spend coins — with real examples, and what it does and does not mean.]]></description>
      <pubDate>Tue, 31 Mar 2026 12:00:00 GMT</pubDate>
      <dc:creator>Jacob Hoffman</dc:creator>
      <category>Blockchain</category>
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      <title>How to read a block explorer, step by step</title>
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      <description><![CDATA[A block explorer is a public website for reading a blockchain directly. Here is how to look up a transaction, read a block and avoid fake look-alikes.]]></description>
      <pubDate>Sun, 08 Mar 2026 12:00:00 GMT</pubDate>
      <dc:creator>Tomás Ferreira</dc:creator>
      <category>Blockchain</category>
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      <title>What goes inside a blockchain block?</title>
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      <description><![CDATA[A blockchain block is a container with a header of metadata and a list of transactions. Here is what each field does and why blocks chain together.]]></description>
      <pubDate>Sat, 14 Feb 2026 12:00:00 GMT</pubDate>
      <dc:creator>Tomás Ferreira</dc:creator>
      <category>Blockchain</category>
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      <title>What does block finality mean?</title>
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      <description><![CDATA[Block finality is the point where a blockchain payment can no longer realistically be reversed. Here is how each chain decides when that moment arrives.]]></description>
      <pubDate>Thu, 22 Jan 2026 12:00:00 GMT</pubDate>
      <dc:creator>Tomás Ferreira</dc:creator>
      <category>Blockchain</category>
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      <title>What is a consensus mechanism?</title>
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      <description><![CDATA[A consensus mechanism is the rule set a blockchain uses to agree on one record. How proof of work and proof of stake get there, in plain English.]]></description>
      <pubDate>Tue, 30 Dec 2025 12:00:00 GMT</pubDate>
      <dc:creator>Tomás Ferreira</dc:creator>
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