Aging and longevity
Scientists found that squirrels extract nitrogen from their urea to make proteins.
Reducing the speed of the already-slow replication process could be a new way to attack the disease.
Study attributes age-related hearing loss to hair cells -- the same sense organs that are damaged by loud noises.
Review study examines why people are suffering heart attacks during high intensity and endurance exercises such as marathons and triathlons.
New insights may help with new treatments for cataracts and other illnesses.