Telescope to unlock secrets of universe

Many people have an inner desire to peer into space and seek for origins of the universe. But few are as talented and lucky as Li Di, who gets to fulfill that desire as deputy chief engineer of the world's largest 'ear' for listening to signals from the cosmos.

Li is working on China's gigantic 500-meter Aperture Spherical Telescope project, also known as FAST, which is the world's largest radio telescope.

Located in a valley deep in Southwest China's mountainous Guizhou province, FAST features a reflector as large as 30 soccer pitches. It is built to seek gravitational waves, detect radio emissions from stars and galaxies, and search for signs of intelligent extraterrestrial life.