Pam Belluck

Successful sellers on eBay know certain things matter: item description, appealing photos, strong seller ratings and, of course, price. Now, a study published Friday in the journal Science suggested another factor might make a subtle difference: whether the seller is a man or woman.

New research suggests that the risk of developing dementia is decreasing for people with at least a high school education, and that lifestyle changes and better physical health can prevent or hold off the disease.