The abstract in PubMed or at the publisher’s site is linked when available and will open in a new window. Tsuji R, Fujita R, Hayashi T, Sadaki S, Matsumoto T,

Archean Earth – Grok via Astrobiology.com The habitability of the early Earth was affected by various factors. We focus here on atmospheric oxygen (O2) and methane (CH4). O2 is essential

Comparison of planet radius distributions and radius–period diagrams across stellar age bins. Upper panels: Planet-radius histograms for four equally populated age bins, defined by the 25th, 50th, and 75th percentiles

ISO Short Wavelength Spectrometer (SWS) spectrum of the Galactic source, W33A, an extremely embedded high-mass young stellar object (Gibb et al. 2004). This source exhibits strong ice absorption features due