Whether or not you'll someday get cancer or any disease can feel like a roll of hundreds of dice. Calculating the odds --€” and knowing what they mean --€” is tricky. Katie Harbath/Flickr hide caption

toggle caption Katie Harbath/Flickr

Kids who can't resist temptation early on may have trouble with it throughout their lives. iStockphoto.com hide caption

toggle caption iStockphoto.com

BJ Casey on Talk of the Nation

  • <iframe src="https://www.npr.org/player/embed/140849231/140849870" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">