Comets didn’t seed life on Earth after all, a new study suggests, potentially overturning a century-old idea. The theory that comets delivered the molecular building blocks for life on Earth is a long-standing one, since comets are known to carry…
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A long-standing theory says comets brought the building blocks of life to Earth, but new research challenges this idea. The study finds that such an event would have been extremely rare, calling it a “one-in-a-million occurrence.” Scientists at the University…
Comets didn't seed life on Earth after all, a new study suggests, potentially overturning a century-old idea. The theory that comets delivered the molecular building blocks for life on Earth is a long-standing one, since comets are known to carry…
A laboratory study shows that bacterial cell surfaces and their extracellular polymers play distinct roles in determining whether calcium phosphate precipitates as phase-pure hydroxyapatite or as mixed precursor phases. Bacteria do not merely trigger the precipitation of calcium phosphate minerals;…
is a widely used analytical technique across chemistry, biological sciences, biochemistry, and biophysics. It involves measuring the absorption of light by molecules across a wavelength range from the mid and near UV (200 nm–400 nm) to visible light (400 nm–900 nm). The…
"According to our calculations, the oxidation of methanediol in the gas phase produces up to four times as much formic acid as what is produced in other known chemical processes in the atmosphere," says Domenico Taraborrelli. This amount reduces the…
[ACS] Subsurface oceans inside icy moons are expected to contain dissolved salts whose crystallization controls the mineralogy of their hydrospheres and potentially their surfaces. Here, we use in situ neutron diffraction to investigate the isobaric crystallization of a nearly saturated…
The Atacama Desert serves as a Mars analogue site. (Credit: Vinicius Henrique / Unsplash) The North of Antofagasta site in the Atacama Desert, a Mars-analog environment where samples analyzed in this study were collected. (Credit: Christopher E. Carr) A team of researchers…
Astrobiology Web [Astrobiology (Journal) via PubMed] The original Miller-Urey experiment demonstrated the abiotic synthesis of organic compounds under early Earth conditions, yet the physicochemical properties and internal organization of the associated insoluble solid organic films (SOFs) remain poorly constrained. Here…
Chemistry of other worlds' atmospheres and surfaces: Mars, Venus, Titan and Europa, exoplanet atmospheres and biosignature gases.
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