Greek tragedy was performed at religious festivals — three playwrights competed annually, each producing four plays.

In Norse mythology, Odin sacrificed one eye to drink from the Well of Wisdom and gain cosmic knowledge.

Particles can exist in multiple states until observed.

The Boston Marathon is the world's oldest annual marathon, first held in 1897.

In Chinese mythology, dragons are benevolent creatures associated with water, rain, and imperial power — opposite to Western dragons.

The fastest recorded tennis serve exceeded 150 miles per hour.

Operation PBSUCCESS involved CIA actions in Guatemala in 1954.

The first Olympic Games were held in 776 BC in Olympia, Greece, and featured only a single footrace.

The Large Hadron Collider is the world's largest particle accelerator.