Intrigued by how viruses jump from animals to humans, Hector Aguilar-Carreno studies Henipaviruses, which have caused deadly outbreaks of Nipah virus.

How do lobbyists influence congress? How do we estimate the reach of social networks? Marco Battaglini uncovers fascinating answers.

Massive data now help us understand the effects of mass incarceration, how money controls what politicians say, and what influences political agendas.