Throughout Earth's history, CO2 is thought to have exerted a fundamental control on
environmental change. Here we review and revise CO2 reconstructions from boron isotopes …

Determining diet is a key prerequisite for understanding species interactions, food web
structure and ecological dynamics. In recent years, there has been considerable …

Natural gas (NG) is a naturally gaseous hydrocarbon mixture that is formed under the earth's
surface. NG is considered to be the cleanest fossil fuel and is a safe source of energy when …

Jupiter's moon Europa has a subsurface ocean beneath an icy crust. Conditions within the
ocean are unknown, and it is unclear whether it is connected to the surface. We observed …

Compound-specific isotopic analysis of amino acids (CSIA-AA) has emerged in the last
decade as a powerful approach for tracing the origins and fate of nitrogen in ecological and …

A new route for the formation of gammacerane from tetrahymanol is proposed; in addition to
dehydration and hydrogenation, sulphurisation and early C S cleavage are shown to be …

Kerogen, commonly defined as the insoluble macromolecular organic matter (OM)
dispersed in sedimentary rocks, is by far the most abundant form of OM on Earth. This fossil …

The ratio of dibenzothiophene to phenanthrene and the ratio of pristane to phytane, when
coupled together, provide a novel and convenient way to infer crude oil source rock …

The nitrogen isotopic composition (δ15N) of amino acids is potentially useful as an
alternative method for estimating the trophic levels of organisms in food webs. However …

Stable isotope ratios are reported in the literature in terms of a deviation from an
international standard (δ‐values). The referencing procedures, however, differ from …