1) The Tony Awards celebrate excellence in Broadway theater and have been awarded annually since 1947.

2) The concept of gravity was famously described by Sir Isaac Newton after an apple fell on his head.

3) The world's largest desert is the Sahara Desert in Africa, covering an area of about 3.6 million square miles (9.4 million square kilometers).

4) The Russian Revolution in 1917 resulted in the overthrow of the monarchy and the establishment of a communist government under Vladimir Lenin.