Fidel Castro

Enrique Marcarian/REUTERS

Fidel Castro.

Cuba, you owe us $7 billion

Behind the trade embargo lies a huge and nearly forgotten obstacle: the still-active property claims by American companies. By Leon Neyfakh

Uncommon Knowledge

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2014/04/19/BostonGlobe.com/Ideas/Images/20uk3--90x90.jpg The glee of ‘ee,’ the woe of ‘oh’

And more surprising insights from the social sciences.

Brainiac

The tiniest sand castle of all

And other recent highlights from the Ideas blog.