1
The “432 Hz vs. 440 Hz” conspiracy theory
<p>Would you believe that there is a conspiracy theory about the way we tune musical instruments? And that this theory even involves the Nazis, chakras, and whatnot? No? Then sit down and enjoy
Jakub Marian
Articles and ebooks about language learning, science and art – and lots of maps.
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Visit jakubmarian.com → On Hacker News Oct 2016 – Mar 2026
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2
The Difference Between ‘Violet’ and ‘Purple’ (2015)
<p class="indent">People say that a picture is worth a thousand words, so let’s take a look at the two colours in comparison (there are various shades of purple and violet, and the following
3
French e, è, é, ê, ë – what's the difference?
A complete explanation of how e, è, é, ê, and ë are used in French, with rules, examples and pronunciation.
4
Where in Europe is electric car a good idea?
<p>Politicians and car manufacturers praise electric cars as a solution to fight climate change, but the life cycle analysis of the whole vehicle shows that electric cars also cause pollution,