molecular-medicine

Lab mice, perk up your fuzzy little ears. You are not the only species that struggles through mazes in the name of science. Here, it's an eight-year-old boy who can't see too well. But don't feel bad, in the second video he aces the test when he's allowed to use his eye that's been treated with gene therapy. This procedure is one of the few successful applications of gene therapy, a technique that people once thought would cure nearly all ills, but problems getting the genes into the body's cells has plagued the field every step of the way.

In February, researchers at UCLA announced a clash of the titans, biochemically speaking: They turned one of the great scourges of humankind—HIV—into a hunter of another: cancer. In tests on mice afflicted with metastatic melanoma, a modified strain of HIV invaded cancer cells without infecting the rodents with AIDS.