Check out the BrainFood podcast: https://itunes.apple.com“”) ?Some of our favorites: https://www.youtube.com/playlist?list=PLR0XuDegDqP10d4vrztQ0fVzNnTiQBEAA ?Subscribe for new videos every day! https://www.youtube.com/user/TodayIFoundOut?sub_confirmation=1 Never run out of things to say at the water cooler with TodayIFoundOut! Brand new videos 7 days a week! More from TodayIFoundOut What Causes Hiccups https://youtu.be/VCeMwgx5nqU?list=PLR0XuDegDqP01NqW8KRpOy-_y2m6S2VEF What Causes “Eye Floaters? https://youtu.be/Ji7qP4-FK7c?list=PLR0XuDegDqP01NqW8KRpOy-_y2m6S2VEF In this video: Have you ever seen the toenails of your grandfather and thought he might be a troll? Those yellow, misshapen and brittle nails tend to make small children cringe, and in response, he wears knee high black socks with sandals. Want the text version?: http://www.todayifoundout.com/index.php/2014/05/toenails-turn-yellow/ Image Credit: https://www.flickr.com/photos/53326337@N00/4274765773/ https://www.pexels.com/photo/person-wearing-a-pair-of-blue-low-top-sneakers-971092/ https://www.bigstockphoto.com/ru/image-228777175/stock-photo-onychomycosis%2C-nail-disease-due-to-the-action-of-pathogenic-fungi https://www.bigstockphoto.com/ru/image-153944099/stock-vector-structure-of-a-nail-human-nail-anatomy https://www.bigstockphoto.com/ru/image-226091602/stock-vector-types-of-epithelial-cells%3A-cilliated-columnar%2C-simple-columnar%2C-simple-cuboidal%2C-and-simple-squamous https://www.bigstockphoto.com/ru/image-83308367/stock-photo-toenails-with-common-fungal-infection https://www.bigstockphoto.com/ru/image-123095918/stock-photo-blackboard-with-the-chemical-formula-of-cysteine https://www.bigstockphoto.com/ru/image-228875557/stock-photo-close-up-of-nail-affected-by-onychomycosis-following-the-action-of-pathogenic-fungi https://www.bigstockphoto.com/ru/image-228777181/stock-photo-onychomycosis%2C-nail-disease-due-to-the-action-of-pathogenic-fungi https://www.b