A logic puzzle with aliens who can only ask yes or no questions reveals how quickly reasoning can become paradoxical.

Viborg, Denmark – This Romanesque-style cathedral stands as one of the oldest and most well-preserved buildings in the city.

PBS NC helps your community explore new worlds and ideas through programs that educate, inform and inspire. Your ...

Phillip Molnar covers residential real estate as well as other business issues for The San Diego Union-Tribune. He is an award-winning reporter who has worked for newspapers across the country, ...