Exploring Why Some People Get Fitter Than Others

Anyone in a running group or gym class has likely noticed that some of the participants annoyingly become much fitter than others. But exactly why some people’s bodies respond well to working out and others do not puzzles scientists.

The ghost in the Planalto

Dilma Rousseff is in office but no longer in power.  And the nominally ruling left-wing Workers Party (PT) no longer calls the shots in Brasília, the capital.

How poverty might change the brain

Martha Farah is leaning forward, furiously typing on her thin laptop in her spacious office at the University of Pennsylvania. Awards, paintings and posters lean against the walls on the floor as she puts the final touches on a grant proposal.