Robert Frost, born on March 26, 1874, in San Francisco, became one of the most famous poets in American history. His family moved to New England when he was 11, and the farms, forests, and stone walls of that region became the setting for nearly all of his poetry. Frost's poems use simple, everyday language to explore deep ideas. His most famous poem, "The Road Not Taken," describes a traveler who comes to a fork in the woods and must choose one path. The poem ends with the line, "I took the one less traveled by, and that has made all the difference." People often use this line to talk about making bold choices. Frost won four Pulitzer Prizes for poetry, more than any other poet. In 1961, President John F. Kennedy invited him to read a poem at his inauguration, the ceremony where a president takes office. Frost was 86 years old. The sun was so bright that he could not read the new poem he had written, so he recited an older poem from memory instead. His ability to write poems that sound like regular conversation but reveal surprising meanings underneath is what makes his work last.