Study upon study is convincing scientists that the chemicals we spray on our crops are one cause of a dreaded disease -- especially if we are exposed to them at a young age.
Nanomaterials have a much higher surface-to-mass ratio, and while this makes them good for such purposes as water filtering, it also could cause them to interact with body cells that their tiny size allows them to infiltrate.
Nanotechnology is poised to transform our lives: miraculous cancer treatments, perfect sunscreens, a super new power grid. One problem: Nobody knows if this multi-billion-dollar enterprise is actually safe.