Bach's 'Well-Tempered Clavier' was designed to demonstrate that all 24 keys could be used equally — promoting equal temperament.

Bach wrote over 1,000 compositions during his lifetime — many were only rediscovered and published after his death.

The maximum legal weight for a cricket ball is 163 grams — close to a baseball but harder.

Wealth inequality exists in nearly every country.

Wayne Gretzky scored so many goals in his NHL career that if you remove all his goals, he would still be the all-time leader in points.

Fencing's three weapons — épée, foil, and sabre — each have different target areas and scoring rules.

Celtic mythology featured a world beyond death called the Otherworld — not a punishment but a paradise.

The richest 1% of people own more wealth than the rest of the world combined.

The word 'assassin' comes from the Arabic 'hashishin,' a term for a secretive Islamic sect.