I live in São Paulo, where Spanish and Portuguese dance through daily life. At the playground I hear abuela, cariño, alegría.

From finding out where swallows go in winter to discovering microbes here are 10 of the greatest biological discoveries ever ...

Supermarket shelves can look full despite the food systems underneath them being under strain. Fruit may be stacked neatly, ...

Pew Research Center is a nonpartisan, nonadvocacy fact tank that informs the public about the issues, attitudes and trends shaping the world.

Alarm clocks, maps, books, flashlights, watches, radios, MP3 players, Palm Pilots, remote controls, cameras, handheld recorders and other devices have all been gradually absorbed into a single one: ...

Surry County Science Fair Winners from North Surry High School. Several students from North Surry High School recently received awards at the county science fair. Students who won first place advanced ...

Real-world optimization problems often require an external “modeling engine” that computes fitnesses or data that are then input to an objective function. These programs often have much longer ...