1) The development of artificial intelligence (AI) has led to advancements in areas such as machine learning, natural language processing, and computer vision.

2) The #MeToo movement, originating in 2006 and gaining widespread attention in 2017, raised awareness about sexual harassment and assault, encouraging survivors to share their experiences and promoting discussions on consent and gender equality.

3) The Mona Lisa, painted by Leonardo da Vinci, is one of the most famous and valuable artworks in the world.

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