Phylogenies inferred under the gradual+abrupt clock model. The three-point estimates summarize their respective tree posterior distributions using the conditional clade distribution 0 method . Median estimates of branch spike sums

Keith Cowing Explorers Club Fellow, ex-NASA Space Station Payload manager/space biologist, Away Teams, Journalist, Lapsed climber, Synaesthete, Na’Vi-Jedi-Freman-Buddhist-mix, ASL, Devon Island and Everest Base Camp veteran, (he/him) 🖖🏻 Follow on

Stitched BF-STEM micrograph of sample A0461-01-FIB02 with the typical observed OM morphologies marked. a – globular OM in various sizes and textures, b – fragmented globular OM, c – irregular

A: Schematic of the ultra-high vacuum chamber used for electron irradiation experiments of Europan ice analogs. B: Shift in the resonant frequency of the QCM during co-deposition of H2O and

New observations from NASA’s Hubble Space Telescope have investigated the nature of the powerful gamma-ray burst GRB 190114C by studying its environment. Shown in this artist’s conception, gamma-ray bursts are

Mass-Radius plot of asteroids, moons, planets, brown dwarfs and low-mass stars. From nearly 5600 exoplanets listed in the PHL-HWC database, 1504 are categorized as terrestrial worlds (orange dots), 2609 as

Graphical abstract — ACS Earth and Space Chemistry Unraveling life’s origin involves finding environments that can form and preserve organic molecules, with hydrothermal systems offering a likely setting. Terrestrial mineral