HealthPop video: Long hours are depressing, scientists zap rats

On this week's HealthPop video:

• Does work get you down? You're not alone. But a new study says people who work more than 11 hours per day are much more likely to be depressed. Wait until you hear the reasons why...you might be even more depressed.
• Why are scientists at the University of North Carolina zapping rat sperm with ultrasound?
• And introducing a new HealthPop segment: "What the Health?"
  

See for yourself, from CBSNews.com's Nick Dietz, in the latest HealthPop video.