GMRT detects radio signal emitted by atomic hydrogen from galaxies that existed more than eight billion years ago. A team of Indian astronomers has used the Giant Metrewave Radio Telescope (GMRT) near Pune to detect the average radio signal emitted by atomic hydrogen, known as the HI 21 cm signal, from galaxies that existed 8-9 billion years ago. The GMRT detection from the galaxies in a patch of sky known as the COSMOS field is only the second measurement of the average atom