1) The world's largest desert is the Antarctic Desert, covering around 5.5 million square miles.

2) The speed of a sneeze can reach up to 100 miles per hour (160 kilometers per hour).

3) The Black Lives Matter movement gained renewed momentum in 2020 following the killings of George Floyd, Breonna Taylor, and others, sparking protests and discussions on systemic racism, police reform, and social justice around the world.

4) The concept of separation of powers, as articulated by French philosopher Montesquieu, refers to the division of government responsibilities into distinct branches, such as the executive, legislative, and judicial, to prevent concentration of power.