1) The Mongol Empire, under the leadership of Genghis Khan, became the largest contiguous empire in history, spanning from Asia to Europe.

2) The push for racial and social justice has led to discussions and actions to address systemic racism, promote inclusivity, and challenge inequalities in various areas, including education, criminal justice, and economic opportunities.

3) The NBA (National Basketball Association) is widely regarded as one of the most popular and competitive professional basketball leagues in the world.

4) The world's largest ocean, the Pacific Ocean, covers an area of approximately 63 million square miles.