1) The word "music" contains two vowels: U and I.

2) The sunflower is not a single flower but a cluster of small flowers arranged in a spiral pattern.

3) The speed of a sneeze can reach up to 100 miles per hour (160 kilometers per hour).

4) The first successful mass-produced personal computer, the IBM PC, was introduced in 1981 and played a significant role in popularizing the use of computers in homes and offices.