For many years, the advice from scientists and experts to people of all ages has been pretty universal: using your phone before bed will mess with your sleep .  But findings from a new study conducted by Toronto Metropolitan University (TMU) and the Université Laval paint a more complicated picture of the modern nighttime habit . The self-reported study asked more than 1,000 adults across Canada about their bedtime screen use and sleep health, and found that overall sleep health was similar