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

2) Cricket, originating in England, is a popular sport played in many countries and is known for its distinctive rules and terminology.

3) The increasing emphasis on mental health and well-being has led to greater awareness, advocacy, and destigmatization of mental health issues, as well as efforts to improve access to mental health services and support systems.

4) The United Nations (UN) is an international organization founded in 1945 with the goal of promoting peace, security, and cooperation among nations through diplomatic and political means.