The mouse that beat cancer.
In 1999 scientists discovered a mutant mouse with the ability to ward off aggressive cancers. Bred with a female, this mighty mouse passed on his cancer resistance to roughly 40 percent of his offspring. No matter how many times the researchers challenged the immune systems of these mice with levels of cancer cells millions of times stronger than those lethal to regular mice, they proved incapable of developing cancer. Now investigators have found that normal mice injected with white blood cells from cancer-resistant mice become resistant themselves.