Leaning back in his chair on a gloomy Oxford morning, a computer scientist likened artificial intelligence systems to a swarm ...

There’s a place in Portland where treasure hunters, bargain enthusiasts, and the environmentally conscious converge like pilgrims to a shrine of secondhand splendor.

Twenty dollars at the Kent Goodwill might buy a week’s worth of professional outfits, enough books to last a month, dishes to serve a dinner party, or decorative items to refresh an entire room. The ...