Fragranced consumer products emit volatile organic compounds that form nanoparticles, contributing to indoor air pollution ...

These chains come in a wide range of lengths. In humans a typical protein is about 400 amino acids long; some are a lot longer. Molecules of RNA, one of the two nucleic acids, can reach up to 100,000 ...

Earth scientists often face huge challenges when researching Earth's history: many significant events occurred such a long ...