(HealthDay News) -- "Failure to thrive" occurs among infants who don't grow and gain weight as quickly as they should.

(HealthDay News) -- Popcorn can be a healthy snack, but you have to skip the butter and salt.

TUESDAY, Nov. 8 (HealthDay News) -- Curiosity may be dangerous for cats but it's great if you're a student, a new study suggests.

TUESDAY, Nov. 8 (HealthDay News) -- Smoking bans in public places have had a spillover effect by reducing smoking in homes as well, according to a new study.

TUESDAY, Nov. 8 (HealthDay News) -- Despite concerns that the complex offerings under Medicare Part D prescription drug plans would confuse older Americans, a new study finds seniors are able to figure out which plan costs them the least.

TUESDAY, Nov. 8 (HealthDay News) -- The reversal of a kidney allocation policy has improved black patients' chances of receiving a new organ from a deceased donor, U.S. researchers say.

TUESDAY, Nov. 8 (HealthDay News) -- Astronauts who spend six months or more in space may experience changes in the structures in the back of their eyes, causing their vision to become blurry, according to a new study from NASA.

TUESDAY, Nov. 8 (HealthDay News) -- Health care providers who wear gloves are less likely to wash their hands before and after treating their patients, new research shows.

TUESDAY, Nov. 8 (HealthDay News) -- Most people with a genetic heart disease called hypertrophic cardiomyopathy (HCM) can live a normal length of time, according to the first science-based guideline for diagnosing and treating the condition.

MONDAY, Nov. 7 (HealthDay News) -- An investigational drug called pridopidine seems an effective and safe treatment for people with the progressive movement disorder Huntington's disease, researchers report.

TUESDAY, Nov. 8 (HealthDay News) -- Three teenage boys suffered heart attacks after smoking K2, a form of synthetic marijuana, according to a new case report.

TUESDAY, Nov. 8 (HealthDay News) -- A vaccine that coaxes the body to attack tumor cells has shown promise in a small study of advanced breast and ovarian cancer patients, improving overall survival times and stopping the disease for a handful of breast cancer patients.

TUESDAY, Nov. 8 (HealthDay News) -- The latest rating scale to determine a person's risk of committing suicide might be better than other such scales at spotting people in most urgent need of help, researchers report.

Here are some of the latest health and medical news developments, compiled by the editors of HealthDay:

TUESDAY, Nov. 8 (HealthDay News) -- New research finds older U.S. women have higher odds of dying from breast cancer than younger women, suggesting that older patients may not be benefiting as much from advances in breast cancer care made over the past three decades.

TUESDAY, Nov. 8 (HealthDay News) -- The brains of autistic children have far more neurons in the prefrontal cortex than the brains of kids without autism, finds a new study that could advance research into the disorder.

TUESDAY, Nov. 8 (HealthDay News) -- To prevent stroke in certain high-risk patients -- those with a blocked neck artery who have already had a so-called "mini-stroke" -- drug treatment appears as effective and far less risky than bypass surgery, researchers find.

TUESDAY, Nov. 8 (HealthDay News) -- Doctors who own equipment for cardiac stress tests are more likely to perform the tests, even when guidelines don't recommend it.