Ruben Crespo, a Puerto Rican postdoctoral scientist at the Mayo Clinic studies stem cells hoping to understand how they can be used to regenerate important organs such as the heart,

The original version of this article is in Spanish. You can see it by clicking on ESPAÑOL on the right top corner of your screen. You can also contact our editor Mónica I. Feliú-Mójer (moefeliu@cienciap.org).