“This is the magical thing: It spreads like face cream and grips like sandpaper,” says Douglas Jerolmack, Edmund J. and Louise W. Kahn Endowed Term Professor of Earth and Environmental Science, about mud that has coated all the balls used in Major League Baseball for decades. In a new study, Jerolmack and colleagues found what they consider to be remarkable mechanical properties of this mud.

Simon Martin, an adjunct associate professor in the Department of Anthropology and a curator at the Penn Museum, comments on the discovery of a previously unknown Maya complex in Mexico. “It is fascinating,” he says. “This demonstrates, to a high degree of confidence, that the landscape was heavily populated everywhere.”
 

In a piece Sarah Bush, Associate Professor of Political Science, wrote with colleague Lauren Prather of the University of California, San Diego, the pair argue that giving greater access and paying more attention to credible, nonpartisan election monitors in the U.S. could increase public confidence in elections.

Jeffrey Kallberg, Deputy Dean and William R. Kenan, Jr. Professor of Music, helped verify the authenticity of a recently discovered unknown work by the famous composer. “The way that Chopin writes clefs, the way that he writes noteheads and stems, the way that he writes dynamics, the color of the ink—all of those immediately said Chopin,” Kallberg says.