Washington: Gold, silver and porcelain are among the many materials dentists can use to fix damaged teeth. Soon diamonds — at least tiny, microscopic ones — could be added to that list. Scientists have developed a new material with nanodiamonds that has the potential to improve current root canal therapies and help prevent future infection. Their report appears in the journal ACS Nano.

Washington: When a Lake Malawi cichlid loses a tooth, a new one drops neatly into place as a replacement. Why can't humans similarly regrow teeth lost to injury or disease?

Washington: A federally funded analysis of MRI scans of the aging hearts of nearly 3,000 adults shows significant differences in the way male and female hearts change over time.

Ann Arbor: A banana a day may not keep the doctor away, but a substance originally found in bananas and carefully edited by scientists could someday fight off a wide range of viruses, new research suggests.

Washington: As you sit and read this at your desk, fluid is slowly leaking out of the porous cartilage in your knee into a membrane-walled cavity between your upper and lower leg bones.

Washington: Researchers at NYU Langone Medical Center say they have added to evidence that a shell-shaped region in the center of the mammalian brain, known as the thalamic reticular nucleus or TRN, is likely responsible for the ability to routinely and seamlessly multitask.