This "map" could change the way we treat cancer

There are countless ways for a person to develop cancer, and this tangle of biological routes leading to illness can make it more difficult for researchers to develop treatments and cures. Scientists have already done a lot of work on sequencing the genes of cancer cells. That's given them insight into what a cancer cell looks like and how it grows endlessly. But to know what fuels those cells, and where they come from, scientists had to plot a course back to each cell's source.