For more than a decade, a robotic explorer has been traveling across Mars, quietly collecting clues about a time when the Red ...

More organic chemistry - AQA Alkanes, alkenes, alcohols and carboxylic acids are different homologous series of organic compounds. Naturally occurring and synthetic polymers can be formed from a ...

The alkanes are a homologous series with a structure ... The intermolecular forces vary between molecules, so different organic compounds have different melting points and boiling points.

These alkanes are likely fragments of fatty acids ... Previous missions had found simple organic compounds—small molecules made up of just a few atoms—but the discovery of larger carbon ...