Molecular fossils of biological lipids are preserved in 2700-million-year-old shales from the
Pilbara Craton, Australia. Sequential extraction of adjacent samples shows that these …

The atmosphere has apparently been oxygenated since the 'Great Oxidation Event'ca 2.4
Ga ago, but when the photosynthetic oxygen production began is debatable. However …

There is a close spatial relation between high-grade gold mineralization in the
Witwatersrand basin and carbonaceous nodules, veins and seams. Hydrocarbons thus may …

This review covers global uppermost Neoproterozoic–Cambrian petroleum systems using
published information and the results of studies undertaken by the Geological Survey of …

Life, as we know it, is based on carbon chemistry operating in an aqueous environment.
Living organisms process chemicals, make copies of themselves, are autonomous and …

It is widely hypothesised that primeval life utilised small organic molecules as sources of
carbon and energy. However, the presence of such primordial ingredients in early Earth …

In this study, compositions and δ13C and δ2H isotopic values of hydrocarbon gases from 5
mines in the Witwatersrand basin, South Africa, support the widespread occurrence of …

A diverse assemblage of indigenous carbonaceous microstructures, classified here as
highly probable microfossils to pseudomicrofossils, is present in the> ca. 2.97 Ga Farrel …

Morphologically diverse structures that may constitute organic microfossils are reported from
three remote and widely separated localities assigned to the ca. 3400 Ma Strelley Pool …

We explore the likelihood that early remains of Earth, Mars, and Venus have been preserved
on the Moon in high enough concentrations to motivate a search mission. During the Late …