berliner-unterwelten.de
From Flak Towers to Mountains of Debris
Der Berliner Unterwelten e.V. erforscht und dokumentiert seit 1997 unterirdische Bauwerke der Bundeshauptstadt und macht sie, sofern möglich, der Öffentlichkeit im Rahmen von Führungen zugänglich. Im ...
![Comic. [Two identical machines face each other with a gap between them. Each is mounted on a box with a cable connecting it off-panel, webcams pointed at each other, and two flags at different angles that can move.] [caption] Networking tip: Separate sensitive components with a semaphore gap.](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:cz73r7iyiqn26upot4jtjdhk/bafkreic4v4hvmzrkuhrd3uf6akmtzumrsex4gclro2spqkss2mdwvdxvam)
![Comic. [Two people with tiny star floating above display on table.] PERSON 1 with ponytail: Now, your grandmother said this was a relic low-mass population III star, from the first generation of stars. Unfortunately, the high iron content shows that it formed much later, after several rounds of supernovas. I’m afraid it’s a population I star. PERSON 2: Aw, darn. Well, it still has sentimental value. [banner for Antiques Roadshow]](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:cz73r7iyiqn26upot4jtjdhk/bafkreid2vzxc6ftisazc66p275gofrnkpbotbksmz7prz26wkuej7653we)
![Comic. [chessboard with red dotted line and flag at second line. Highlighted rook is positioned next to King behind the red line.] [caption] I thought I had checkmate, but I didn’t realize my rook was offside.](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:cz73r7iyiqn26upot4jtjdhk/bafkreif4par7z6yterrvkhvlnemtc37rpb4yvretekqzpqnxl7gjio7fju)
