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

2) The world's oldest known living tree is a bristlecone pine named "Methuselah" in California, estimated to be over 4,800 years old.

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

4) The word "orange" contains three vowels: O, A, and E.