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Users of an app developed by the University of Michigan to help with jet lag entered information on their time zone and sleep patterns that helped academics with their work. But is the approach valid?

Teens should be included in efforts to mitigate their online risks, researchers say, but apps focus more on parents controlling access by monitoring and blocking sites.

Opioids were a main driver in roughly 1,200 drug overdose deaths in Philadelphia last year.That's four times the city's murder rate. It's time, some officials say, to supervise, not criminalize.

On Earth, crumbs are harmless, but in orbit they can be perilous. But bread is a big deal in Germany, so scientists and engineers there are teaming up to create an oven and dough fit for microgravity.

Graham Greene's novel basis for 1942 film 'This Gun for Hire'

Before Scott Pruitt became the Administrator of the Environmental Protection Agency, his political career was guided in large part by his Southern Baptist faith and a faith-based agenda.

Researchers at the San Diego Zoo Institute for Conservation Research announced Tuesday that they've made their first attempt to artificially inseminate a southern white rhinoceros, in an attempt to save the critically endangered northern white rhino.

Even though congressional Republicans formally set aside their Obamacare repeal-and-replace efforts this summer, there are big policy changes that could become law under pending tax proposals.

Even though congressional Republicans formally set aside their Obamacare repeal-and-replace efforts this summer, there are big policy changes that could become law under pending tax proposals.

Festival runs through Nov. 18 with home base at UltraStar Mission Valley