Taken together, these four features can create a trancelike state that can keep us stuck on social media apps or video games for hours. Children are particularly vulnerable.

Billie Little had worked for Thomson Reuters for about two decades. She was fired after questioning whether federal immigration agents unlawfully used their products.

The Pulitzer-winning composer, whose unconventional music reflects the rugged landscapes he lives in, talks about his relationship to nature and his new piece Horizon.