1) The ocean covers about 71% of the Earth's surface and contains roughly 97% of the planet's water.

2) The first commercial GPS (Global Positioning System) was launched in 1989 and provided accurate positioning and navigation capabilities to users worldwide.

3) Many mountains have cultural and spiritual significance for local communities and are often considered sacred or revered in religious traditions.

4) The Industrial Revolution, which began in the 18th century, brought about significant changes in agriculture, manufacturing, mining, and transportation.