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.