1) The first photograph of a black hole was captured in 2019 using a network of telescopes around the world.

2) The Machu Picchu archaeological site, located in Peru, is an ancient Incan citadel situated high in the Andes Mountains. It is recognized as a UNESCO World Heritage site and attracts visitors from around the world who come to marvel at its remarkable architecture and scenic surroundings.

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

4) The world's largest ocean, the Pacific Ocean, covers an area of approximately 63 million square miles.