1. What your voice says about your height: Researchers from Washington University recently found that listeners can accurately determine the relative heights of speakers just by hearing them talk. Credit the frequency of “subglottal resonance,” a sound produced in the lower airway of the lungs that gets progressively lower as height increases. Ever wonder why your tall buddies talk so low? Now you know. 2. What your eyes say about your brain: The small vessels behind your eyes could reveal how healthy your brain is, according to a recent report in Psychological Science. Researchers found that people with wider veins scored worse on IQ tests in middle age, which should give you another reason to get your peepers checked yearly. (The eyes are the window to the…mind? 3. What your skin says about your blood pressure: Wrinkles aren't just a sign of aging—they could also portend ticker trouble, says a study in the Journals of Gerontology. When researchers separated people into groups based on cardiac disease risk and analyzed the youthfulness of their skin, those with the fewest wrinkles had lower blood pressure and lower heart disease risk. 4. What your fingers say about your cancer risk: While a longer index finger might give you the . . . er, short end of the stick, here's one plus to a big pointer: it could put you at a lower risk of prostate cancer, according to a study in the British Journal of Cancer. Having less T in the womb could help keep prostate cancer at bay later in life. 5. What your teeth say about your mind: A 2012 study in the Journal of American Geriatrics suggested your ability to chew might predict your risk of dementia. But don't get too worried if you have trouble chomping: The researchers don’t know if mental decline leads to poor dental care and less bite force, if difficulty chewing impacts the brain, or if it's simply just a random correlation. 6. What your pulse says about your heart: The flexibility of your aorta may soon be measured by checking the pulse in your finger, according to researchers at the University of Iowa. Your aorta is a major artery that, when stiff, can increase your risk of dying from heart attack or stroke. That could be good—and much more comfortable—news, since right now doctors have to check your pulse in the femoral artery deep in your groin to screen for aortic stiffness. 7. What your sleep says about your eyes: People with sleep apnea are almost twice as likely to develop glaucoma—an eye disease that can lead to blindness—within five years, finds research from Taiwan. When you aren't breathing at a normal rate, the loss of oxygen triggers damage to the optic nerves, or causes abnormal levels of gases in your blood—both of which could lead to glaucoma. 8. What your lips say about your memory: If you’re one of the millions of people who get cold sores, that pesky outbreak on your lip could put you at an increased risk for Alzheimer’s and dementia, according to a study at Columbia University. Researchers followed adults between the ages of 59 and 79 for eight years and found that those with a higher infectious burden—meaning they’d been exposed to a higher-risk virus, such as herpes simplex virus 1 and 2—were more likely to have worse cognition. Source
