A mass of birds died in Chicago in October after striking one building, adding to the push for more protections in one of the most dangerous cities for avian migration.

© Daryl Coldren/Chicago Field Museum, via Associated Press

This team went guerilla-style into the British Museum to create exact replicas of the Parthenon marbles. This archaeologist and his team had a simple plan — take 3D scans of the Parthenon marbles and recreate them for the British Museum so the originals could be returned to Greece. When the museum said no, they went in anyway, guerilla-style.

The Banksy Museum does not own or display any actual Banksys but rather 167 decent-enough reproductions of them, life-size murals and paintings on panels treated to look like exterior walls that stretch through an exhibition space, designed to resemble the street. Max Lakin for the New York Times

Isabella Gomez Sarmiento for Morning edition:Museum founder Hazis Vardar says, "Banksy changed the rules. If you want to organize something about Banksy, you have to change the rules also," he said on a recent walk through the exhibit. Natasha Gural at Forbes supplies a more in-depth review: 4 Ways To See Beyond Graffiti At The Banksy Museum In New York Banksy Museum website