What did you learn this week? We learned …
… you can print your own portable universe—for free!
… how to navigate the languages of New York. Editor’s pick of the week!

… why earworm songs are earworm songs.
… all about the archivists, folklorists, and curators fighting to save South Sudan.

Photograph by D. Willetts, courtesy UNESCO and Wikimedia. CC-BY-SA-3.0
… why London didn’t quite redesign after the great fire, and why that’s a good thing.

… Mount St. Helens has a stone cold heart.

Photograph by Diane Cook and Len Jenshel, National Geographic
… millimeters-thick foam can obliterate bullets.
… why we still need cartographers.
… a bloody stake stands as a monument to Ivan the Terrible.

Photograph by Vladislav Gultyaev, courtesy VKontakte
… why we’re still fascinated by civilizations sunk beneath the waves.

Map by Rodrigo Boos, courtesy Wikimedia. CC-BY-SA-3.0