1) The word "pencil" contains two vowels: E and I.

2) Cyclones play a vital role in Earth's climate system by redistributing heat and moisture, maintaining global temperature patterns, and influencing weather patterns.

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

4) The oldest known musical instrument is a flute made from a bird bone, estimated to be around 43,000 years old.