<p><img src="https://imgs.xkcd.com/comics/low_background_metal.png" alt="The only effect on the history books were a few confusing accounts of something called &#x27;Greek fire.&#x27;"></p>
<blockquote>
<p>"<a href="https://xkcd.com/2321/">Low-Background Metal</a>", by Randall Munroe, licensed under Creative Commons Attribution-NonCommercial 2.5 License</p>
</blockquote>
<h2 id="alt-text"><a aria-hidden="true" class="anchor-heading" href="#alt-text"><svg aria-hidden="true" viewBox="0 0 16 16"><use xlink:href="#svg-link"></use></svg></a>Alt Text</h2>
<p>The only effect on the history books were a few confusing accounts of something called 'Greek fire.'</p>

xkcd

Low-Background Metal


# XKCD

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