Vitruvian Man, top left, was drawn by Leonardo da Vinci in 1490 to illustrate the proportions of the human body. At right, the portrait, believed to be of a middle-aged Leonardo, was discovered in 2008 in a cupboard of a private house in Italy. It’s attributed to the artist by some historians.

Photo:Bryan Conley

Big Picture

Artist, Pittsburgher, and living legend Thaddeus Mosley makes beautiful wooden sculptures. His contributions to the 57th Carnegie International are on view in Carnegie Museum of Art’s lobby and Sculpture Courtyard through March 25.

Face Time

Nicole Heller

Nicole Heller

Nicole Heller used to spend her days on hands and knees trying to tease apart the secret world of Argentine ants—an invasive insect that has risen to worldwide prominence thanks to its ability to hitch rides on human trade routes. But after several years debating specialized questions about ant behavior with colleagues, Heller, who spent her formative years in Palo Alto, California, started to yearn for something bigger.

Photo: Joshua Franzos

Inside the Museums

Powdermill Nature Reserve in Rector, Pennsylvania, is a research oasis, a natural science classroom, and the source of the best long-term bird-banding data in the country. Here, a researcher releases a bird after identifying, measuring, weighing, and banding it.