1) The invention of the printing press by Johannes Gutenberg in the 15th century revolutionized the spread of knowledge and played a key role in the Renaissance.

2) 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.

3) The world's first insurance policy was issued in 1347 in Genoa, Italy. It insured against the risk of maritime trade.

4) Mount Kilimanjaro in Tanzania is the highest mountain in Africa and attracts climbers from around the world.