1. Einstein was a refugee from Nazi Germany and became a U.S. citizen in 1940.

2. He began his musical career in the early 1950s, and quickly became one of the most popular and influential musicians of his time

3. In the 1970s, the answering machine was invented, it became a popular way for people to screen calls and leave messages

4. James Monroe, the fifth president of the United States, served from 1817 to 1825 and was known for his foreign policy doctrine that became known as the Monroe Doctrine.

5. LeBron James played high school basketball at St. Vincent-St. Mary High School, where he gained national recognition and became a basketball prodigy.

6. Musk was born in South Africa and later became a citizen of the United States and Canada.

7. This was a time-consuming process, and it was not until the invention of the automatic switchboard in 1892 that the telephone system became more efficient