1) The Southern Ocean surrounds Antarctica and is the coldest and least-visited ocean.

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

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

4) The Bank of England, established in 1694, is the central bank of the United Kingdom and one of the oldest central banks in the world.