The $3x+1$ problem, or Collatz problem, concerns the following seemingly innocent arithmetic procedure applied to integers: If an integer $x$ is odd then “mul

What's YOUR personal best? Work your way through these weird and wonderful challenges and record your top scores along the way.

FR-RARE-BK (copy 3): Gift of Diana M. Schatz from the Norah and Roland Michener collection.

In Fatherhood, beloved NBA player, poet, children’s advocate, and devoted dad Etan Thomas speaks from his heart on what matters most in his life: being there