It's hard to admit that mom's nagging was correct more often than not. When she warned us that going outside in the cold would make us sick, she wasn't just being an overprotective helicopter parent. She was actually right.

Last year, a team of researchers led by Ellen Foxman and Akiko Iwasaki of Yale University provided supporting evidence for the popular notion that being in cold weather makes a person more susceptible to catching cold.

Screen Shot 2015-01-30 at 1.27.28 PMThe cranial sinuses are eight cavities within the skull that