Distribution of Pyl in archaea. (A) Proposed mechanism for Pyl biosynthesis (blue), and incorporation (orange) into elongating polypeptides by a Pyl-tRNAPyl charged by its cognate aminoacyl tRNA synthetase (PylS). (B)

Locations of the five stars (yellow circles) that dominate the ionization of the local clouds, shown in Galactic coordinates (ℓ, b) centered on (0, 0). Locations are plotted on the

Exozodiacal dust, depicted in this artist’s illustration as a glowing white haze above the horizon of a hypothetical habitable planet orbiting another star, was found to exist in such large

Energy levels of 2,5-CT and 2,4-CT relative to thiophenol. The geometries and energies were derived at CAM-B3LYP/cc-pCV5Z level of theory. — astro-ph.GA Molecules harbouring sulfur are thought to have played

Alkaline limited regime (left) leads to slow climate recovery. Reef space collapse (right) stimulates nannoplankton productivity and climate recovery. Credit: Tristan Salles/PNAS/USYD Coral reefs have long been celebrated as biodiversity

Examples of mapped large drainage systems on Mars. The dotted white outlines represent drainage boundaries encompassing valley networks (black), lakes (gradient blue), and outlet canyons (yellow) formed by lake breaches.