A man and his dog sleep on a tram. When people don’t get enough sleep, have poor-quality rest, or sleep at the wrong times of day, they are at a
A man and his dog sleep on a tram. When people don't get enough sleep, have poor-quality rest, or sleep at the wrong times of day, they are at a higher risk of heart disease, kidney disease, high blood pressure, obesity, diabetes and depression, according to the National Institutes of Health. (Reuters/Laszlo Balogh)