Some magnetic particles can take on certain attributes when they come in small enough packages, say a few millionths of a millimeter. These special magnetic properties have caught the eye of medical scientists, who have regarded them as potential high-precision tools for carrying drugs to tumor sites with the help of magnetic fields, but their diminutive nature has made them impossible to steer toward the target. Scientists have now found a way to scale up these particles while retaining their desirable magnetic properties, making it possible to commandeer them for the purposes of life-saving drug delivery, among other applications. [Source: http://newatlas.com/supersize-micro-magnets-drug-delivery/46420/]