Exoplanet characterization missions planned for the future will soon enable searches for life beyond our solar system. Critical to the search will be the development of life detection strategies that […]
The BASE (Barberton Archean Surface Environments) scientific drilling project focused on recovering unweathered continuous core through strata of the Paleoarchean Moodies Group (ca. 3.2 Ga), central Barberton Greenstone Belt (BGB), […]
![[L] Absorbance data was acquired on a Perkin Elmer Synergy Neo2 plate reader equipped with monochromator optics. We first conducted spectral scanning from 380 nm to 740 nm (5 nm steps) to determine the wavelength of maximal OD increase (645 nm). Subsequent endpoint reads were acquired pre- and post-UV exposure at that single wavelength. Black columns – liposomes before the UV irradiation; grey columns – liposomes radiated with UV for 3 minutes. [R] Liposomes after 3 min of UV radiation. The top image shows liposomes shielded by cuvettes with distilled water, and the middle and bottom images show liposomes shielded by cuvettes with solutions of (NH4)5[Fe(C6H4O7)2] and FeCl3. -- biorxiv.org](https://i0.wp.com/astrobiology.com/wp-content/uploads/2024/05/Solutions-Of-Ferrous-Salts.png?resize=1200%2C717&ssl=1)
Previously, we presented a hypothesis on the Darwinian evolution of liposomes that relies only on natural and ever-present phenomena: solar UV radiation, day/night cycle, gravity, and the formation of amphiphiles, […]
The plate tectonics theory established in the 20th century has been successful in interpreting many geological phenomena, processes and events that have occurred in the Phanerozoic. However, the theory has […]
Researchers have suggested that the condensation of low-molecular-weight aldehydes under basic conditions (e.g., pH > 11) is the prebiotic reaction responsible for the abiotic formation of carbohydrates.
The biogeochemical sulfur cycle plays a central role in fueling microbial metabolisms, regulating the redox state of the Earth, and impacting climate through remineralization of organic carbon.
Scientists supported in part by the NASA Astrobiology Program have provided new details of how the Hooggeneoeg Formation in South Africa was formed. The Hooggeneoeg Formation is found in the […]
The oxygen isotope record in sedimentary chert and the compelling case for a near constant isotopic oxygen composition of seawater over geologic time support thermophilic surface temperatures prevailing in the […]
Understanding the atmosphere’s composition during the Archean eon is a fundamental issue to unravel ancient environmental conditions. We show from the analysis of nitrogen and argon isotopes in fluid inclusions […]
An international team of researchers, including Scripps Institution of Oceanography, UC San Diego, geochemist James Day, has found new evidence that material contained in oceanic lava flows originated in Earth’s […]
