Other

GMO in sport: Genetically Modified Olympians?

As athletes get ready to smash Olympic records in London, scientists are in a high-stakes race of their own to develop a test that will unmask anyone altering their genes in a desperate quest for gold.

Oncology & Cancer

Doctors: Long-lasting cell treatment cured leukemia patients

In 2010, doctors treated Doug Olson's leukemia with an experimental gene therapy that transformed some of his blood cells into cancer killers. More than a decade later, there's no sign of cancer in his body.

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