Just when we were starting to feel like it was safe to use our cellphones without risk of damaging our “blood-brain barrier”, Dutch scientists are saying the 3G cellular radiation can cause headaches and nausea. On the otherhand, the study also showed, bizarrely, that exposure to 3G base station signals boosted “cognitive functions such as memory and response times.” So your head might hurt like hell, but at least you’ll be smarter.