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Fearless Youth: Prozac Extinguishes Anxiety by Rejuvenating the Brain

Once adult lab mice learn to associate a particular stimulus--a sound, a flash of light--with the pain of an electric shock, they don't easily forget it, even when researchers stop the shocks. But a new study in the December 23 issue of Science shows that the antidepressant Prozac (fluoxetine) gives mice the youthful brain plasticity they need to learn that a once-threatening stimulus is now benign.

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Pickup Soccer Helps Homeless Health

It sounds either really crazy, or kind of obvious. But according to new research, pick-up soccer could help homeless men avert the risk of an early death. Homeless people are known to have poor health and life expectancy.

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This $1 Plastic Chip Can Diagnose HIV In 15 Minutes

In Africa, waiting for blood work can take weeks, and many people don't bother getting their results. A new device could make testing in remote villages a possibility, and that could lead to drastically improved treatment. If you were concerned you had HIV (and lived in America), it would be easy enough to get some blood drawn at a clinic near your house, and wait a few days (or even hours) for the results.

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Diamonds Deliver on Cancer Treatment

By Marian Turner Attaching chemotherapy drugs to small particles called nanodiamonds can make the drugs more effective, according to a study published this week in Science Translational Medicine . Anticancer drugs tend to become ineffective because cancer cells quickly pump them out before they have had time to do their work.

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