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Sure, you resolve to exercise more, but somehow it never happens. It could be that your environment is sabotaging you, psychologists say. A famous study about heroin and the Vietnam War explains how.

Research on sleep-deprived fruit flies identified specific brain cells that can trigger sleep. The finding of these sleep circuits in insects could help scientists better understand human insomnia.

Many people have decried the casting of Zoe Saldana in upcoming biopic Nina, but Ta-Nehisi Coates digs deep into why this choice struck a nerve.

Like Bruce Springsteen, Pearl Jam and others, the renowned violinist has canceled a North Carolina appearance over a law limiting civil rights protections for LGBT people.

Girls who were more physically active at age 11 did better at school as teenagers, a study finds. And the most active girls really aced science.

The Department of Justice awarded nearly $638,000 in federal grant money to UC San Diego to investigate the potential of microbial cells as DNA evidence at crimes scenes.

What you do in your 20s and 30s and 40s can make it more likely that you'll be mobile and healthy in old age, scientists say. That's true even if your ancestors didn't fare so well.

More companies are offering employees training to deal with shooting threats at work. But it presents a dilemma: "How do you create awareness, without creating paranoia?" one expert says.

Young people in seven developing countries were interviewed about past sexual violence. On average, more than 1 in 4 girls and more than 1 in 10 boys reported abuse.

In their congressional testimony this week, Trump's would-be advisers said they disagreed with the incoming president on a range of issues, from Russian hacking to NATO to even that border wall.