Abstract: Global Navigation Satellite Systems typically perform poorly in urban environments, where the likelihood of line-of-sight conditions between devices and satellites is low. Therefore, ...

This story is adapted from Life Kit's Guide to Better Sleep, a one-week email series. Sign up for the special newsletter here. Do you have a wind-down routine? Enjoyable and relaxing habits that help ...

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As marijuana use among teens has grown in the past decade, researchers have been trying to better understand the health risks of the drug. Now, a new longitudinal study finds that cannabis use among ...