Some exciting news in the war on cancer. A new study shows an experimental drug that taps into the power of the body's immune system to fight cancer, is shrinking tumors in patients for whom other treatments had failed.

The drug binds to a protein called PD-L1 that sits on the surface of cancer cells and makes them invisible to the immune system, almost like a cloaking device.

That protein allows the tumor cell to grow unchecked and cause harm to the patient. But with the protein blocked, the immune system can see and destroy cancer cells.

21% of patients initially saw significant tumor shrinkage after at least three months on the medication. One patient saw tumors disappear completely.

The drug also seems to work on a wide range of cancers including those toughest to treat. They include non small cell lung cancer, melanoma, colo-rectal, kidney and stomach cancer.

One researcher says this has all the characteristics of a really amazing drug. He says he can count on one hand the number of times he's seen response rates like this.

At least five companies are involved in backing this research and on scientist says he doesn't think in the history of cancer therapy we've had five or more companies working to develop antibodies targeted at the same pathway.

Cellphone use may reveal your dominant brain. People with left brain dominance tend to listen with their right ear and vice-versa.

The dominant side of your brain is where your speech and language center resides. 95% of the human population is left brain dominant and those people tend to be right handed. The opposite holds true for those who are right-brain dominant.

In a new study, scientists found that roughly 70% of those surveyed, held their cellphone up to their ear that was on the same side as their dominant hand.

This cellphone insight could one day help doctors quickly and safely locate and protect a patient's language center before beginning a potentially risky brain operation.

One researcher said they're pretty confident in their findings. He said if the speech and language center is on the left side of your brain - which for most people they are - a cellphone conversation is going to sound better in your right ear.

For me, I listen with my right ear and I'm left handed. But I've always held the phone with my right hand so I can write if necessary with my left.

Omega 3's are throught to be good for your health. But a new study says they are no help against age-related eye trouble. The study says adding omega 3 fatty acids and other nutrients to standard antioxidant vitamins doesn't give older people any added protection against a leading cause of blindness.

The study looked at age-related macular degeneration, which afflicts millions of older people in the United States. The study's authors say it accounts for 50%A of blindness in America.

Doctor Emily Chew of the U.S. National Eye Institute, along with her colleagues, say without more effective ways of slowing progression, the number of people with advanced AMD will double over the next 20 years, resulting in increasing socioeconomic burden.

They looked at 4,000 patients age 50 to 85 and examined whether adding the other nutrients further reduced the risk. The study's authors say it did not, but they also say it could've been it wasn't taken long enough or the doses were too low.