Ele Willoughby, PhD<p>in particular).</p><p>A career civil servant in Nanyang, Heng was also an <a href="https://spore.social/tags/astronomer" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomer</span></a>, <a href="https://spore.social/tags/mathematician" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>mathematician</span></a>, <a href="https://spore.social/tags/seismologist" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>seismologist</span></a>, hydraulic engineer, <a href="https://spore.social/tags/inventor" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>inventor</span></a>, geographer, cartographer, ethnographer, artist, <a href="https://spore.social/tags/poet" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>poet</span></a>, philosopher, politician & literary scholar. He was a bit of a controversial figure politically, sparing over calendar reform & with rivals amongst the palace eunuchs. But both his poetry & famous inventions are still remembered. He also improved the Chinese approximation for pi & 🧵2/n</p>