Astronomers claim to have discovered two ingredients that build life-forming amino acids -- the molecules methanimine and the hydrogen cyanide -- in a galaxy nearly 250 million light years away from Earth.
Scientists speculate that the transmission could be from a technically proficient society.
China is frantically giving finishing touches to world's largest radio telescope designed to find signs of alien life following NASA's recent discovery of 'Earth 2.0' with the planet-hunting Kepler space telescope.