Eric Walker added The Sounds That Haunted U.S. Diplomats in Cuba? Lovelorn Crickets, Scientists Say - The New York Times to 2017-08 Purported acoustic attacks on United States and Canadian embassy staff in Havana and University of Pennsylvania

Eric Walker added Was It an Invisible Attack on U.S. Diplomats, or Something Stranger? - The New York Times to a number of topics

Eric Walker added Wharton School of the University of Pennsylvania - Wikipedia and At Wharton, a New Leader Confronts the Culture Wars - The New York Times to Wharton School, and added Wharton School to University of Pennsylvania

Eric Walker added a number of topics and a number of links to Pennsylvania, and added Pennsylvania to US states and territories

Eric Walker added Wharton School and The Sounds That Haunted U.S. Diplomats in Cuba? Lovelorn Crickets, Scientists Say - The New York Times and Was It an Invisible Attack on U.S. Diplomats, or Something Stranger? - The New York Times to University of Pennsylvania, and added University of Pennsylvania to Pennsylvania and Specific universities

Eric Walker added a number of topics to Specific universities and colleges, and added Specific universities and colleges to Higher education