Combing Through Terahertz Waves (IMAGE) California Institute of Technology Caption Caltech chemists have developed a precise ruler of terahertz light that will aid in the study of organic molecules in space, and the soft interactions between molecules in water. Due to its resemblance to a hair comb, the ruler is called a terahertz frequency comb. Credit Lance Hayashida/Caltech and NASA/ESA/ and the Hubble Heritage Team (STScI/AURA) - ESA/Hubble Collaboration Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.