Could the chemical fingerprints of life really persist for billions of years, hidden in rocks reshaped by eons of heat and pressure? A new study says yes and the story of Earth’s biosphere begins far ...

Various chemical analysis techniques can be used to help identify the chemicals present in reaction mixtures or give important information about the products of a chemical reaction. Chromatography is ...

Analytical Research & Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States ...