This 180-sided object cannot fit through another like it, no matter where you bore the hole or how you tilt it.

Think you see the world as it is? Think again. The brain’s shortcuts make us efficient—but also deeply biased.

For generations, the idea that ‘opposites attract’ has been a popular explanation for romantic relationships, suggesting that ...

ABC News’ Devin Dwyer reports on the upcoming Supreme Court ruling on affirmative action, and what has driven Justices Clarence Thomas and Sonia Sotomayor to be on opposite sides on ending the policy.