COMING SOON: REVERSING HEARING LOSS As we age, our chances of becoming hearing impaired increases. (Like every other malicious condition, it seems.) About a third of 65-year-olds have hearing loss, and this rises to half by age 75.  This is caused by simple degeneration of inner ear structures over time. If you have hearing problems, help is available in the form of prosthetic devices such as hearing aids and cochlear implants.  But now, there is hope of using stem cells to actually reverse hearing loss. Besides getting older, another major cause of hearing impairment is loud noises—either with long-term exposure...