Alexander Graham Bell (1847-1922) was a Scottish-born inventor, scientist, and engineer who is best known for inventing the telephone. He moved to the United States in 1871 and worked as a teacher of the deaf. Bell's interest in speech and communication technologies led him to experiment with transmitting sound over wires, culminating in his invention of the telephone in 1876. He continued to work on a range of inventions and innovations throughout his life, including the photophone, an early precursor to fiber optic communication. Bell's legacy also includes a range of other inventions and contributions to the fields of telecommunications, aviation, and medicine.