When someone of great importance to the community passes away, a black line is added to the top bar as a show of respect. In today&#x27;s case, it is for Marvin Minsky (<a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Marvin_Minsky" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Marvin_Minsky</a>), pioneer of artificial intelligence research.