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 Pacific Ocean is the largest ocean on Earth, covering more than 30% of the planet's surface.

3) The Renaissance period, which began in Italy in the 14th century, marked a renewed interest in art, literature, science, and philosophy.

4) The Amazon rainforest produces more than 20% of the world's oxygen.