CWmike writes: Stanford University researchers have used nanotechnology and magnetics to create a biosensor that they said should be able to detect cancer in its early stages. The sensor, which sits on a microchip, is 1,000 times more sensitive than cancer detectors used clinically today, say scientists at Stanford. The researchers announced this week that the sensors have been effective in finding early-stage tumors in mice, giving them hope that it can be equally successful in detecting elusive cancers in humans. "In the early stage [of a cancer], the protein biomarker level in blood is very, very low, so you need ultra-sensitive technology to detect it," said Shan Wang, professor of materials science and engineering at Stanford. "If you can detect it early, you can have early intervention and you have a much better chance to cure that person." Nanotech is on a roll lately, going from science fiction to fact. Futurist Ray Kurzweil said recently that nanotech could make humans immortal by 2040, with major chronic diseases like diabetes possibly cured using the technology.