The Sydney Opera House's iconic roof shells are not spheres — they are sections of a single sphere of the same radius.

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

Particles can exist in multiple states until observed.

Synchronized swimming, now called artistic swimming, requires athletes to hold their breath for up to 3 minutes while performing choreography.

Particles can exist in multiple states until observed.

In 2000, a massive fireworks accident damaged part of a Dutch city.

Mozart began composing music at age five.

Archery was the first sport to be included in the Olympics after its original ancient form disappeared from the games.

Project Blue Book investigated reports of unidentified flying objects.