 One of them is where to go when you're in the outer limits. Scientists say they've taken their cue from the movie series Dune. Instead of having astronauts strap on diapers, researchers at Weill Cornell Medical say they've designed a lightweight filtration system, like the full body still suit inhabitants of the fictional Arrakisware, to purify urine using an electrolyte solution, then pumping it back into the spacesuits for drinking purposes. Testing is scheduled to get underway this fall in a Cornell clinical trial. Deborah Rodriguez.