Is one testicle warmer than the other? French study wins spoof Nobel Prize

IN THE PAPERS: Friday, September 13: Paris braces for a massive transport strike over the government's retirement reforms. We also look at reactions to the third Democratic primary debate, which included a Freudian slip from Joe Biden. In Japan, men who were demoted for taking time off to care for their children are challenging their employers in landmark paternity leave cases. And a French researcher wins the "Ig Nobel" prize for studying differences in testicle temperature.