1) The Black Lives Matter movement, which gained prominence in 2013, advocates for racial justice and equality, addressing systemic racism and police violence against Black individuals.

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

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

4) The musical "The Phantom of the Opera" has been running in London's West End since 1986, making it the longest-running musical in history.