A molecule is a group of two or more atoms held together by attractive forces known as chemical bonds; depending on context, the term may or may not include ions which satisfy this criterion. In quantum physics, organic chemistry, and biochemistry, the distinction from ions is dropped and molecule is often used when referring to polyatomic ions. A molecule may be homonuclear, that is, it consists of atoms of one chemical element, e.g. two atoms in the oxygen molecule; or it may be heteronuclear, a chemical compound composed of more than one element, e.g. water. In the kinetic theory of gases, the term molecule is often used for any gaseous particle regardless of its composition. This relaxes the requirement that a molecule contains two or more atoms, since the noble gases are individual atoms. Atoms and complexes connected by non-covalent interactions, such as hydrogen bonds or ionic bonds, are typically not considered single molecules.

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James Webb Space Telescope uncovers building blocks of life in icy molecular cloud

Spin transport measured through molecular films now long enough to develop spintronic devices

Webb Peers Into Frozen Heart of Molecular Cloud – Unveils Dark Side of Pre-Stellar Ice Chemistry

Webb Reveals Rich Composition of Interstellar Molecular Cloud Ices

Fires in a microgravity environment (like the space station) are fed by random oxygen molecules stumbling into them in a process called molecular diffusion. This produces spherical flames that burn more slowly and consume less oxygen, giving off a fraction of the heat emitted by terrestrial flames.

SETI researcher Brian Lacki proposes a new hypothesis for Type 3 Civilizations. "My thought was you harvest molecular clouds where material is relatively easier to collect." These free floating "dust" particles are networked together across huge distances. ‘In a sense the galaxy could become alive.’

Gene expression study reveals new molecular associations with obesity

Chemists Have Developed a New Way To Produce an Important Molecular Entity

Now on the molecular scale: Electric motors

According to a recent study, cells that have a functioning molecular clock are better able to adjust to changes in the supply of glucose and can recover faster from long-term starvation.

Molecular mechanism behind nutrient element-induced plant disease resistance discovered

Machine learning unlocks fluorescent molecular tools for information encryption

Toxoplasmosis: Pathogen with molecular master key

Molecular Clue May Explain Why Women Are More Prone to Alzheimer’s Disease

Molecular Changes Linked to Long COVID a Year After Hospitalization

Genetic Research Reveals Molecular Fingerprint Behind Beautiful Pearls

Molecular shape-shifting

Shocking Study Finds Severe COVID-19 Linked With Molecular Signatures of Brain Aging

The Evolving Landscape of Viral, Immune, and Molecular Biomarkers in Penile Cancer

New way to produce important molecular entity