A new book presents major advances in our understanding of core-mantle interaction and co-evolution, and showcases technological developments improving our insights into deep Earth processes.
hydrogen
Asteroid Impacts Could Have Warmed Ancient Mars
Hydrogen released during large impacts might have boosted Mars’s surface temperature above freezing for thousands or even millions of years, enabling liquid water to flow over the Red Planet.
Hydrogen May Push Some Exoplanets off a Cliff
High-pressure reactions of hydrogen and iron could explain gaps in the distribution of exoplanets.
Ice Cores Record Long-Ago Seasons in Antarctica
Researchers used ice core data to reconstruct seasonal temperatures throughout the Holocene. The results link especially hot summers with patterns in Earth’s orbit.
Callisto’s H Corona: Offspring of the Surface or the Atmosphere?
The mostly unknown Callisto’s H corona is created by a global tenuous H2 atmosphere and not by surface water as previously believed, providing the first evidence for H2 in Callisto’s atmosphere.
Tracing the Path of Gas Atoms from Earth to the Final Frontier
Scientists capture the first complete image of Earth’s luminous geocorona and prove its ecliptic north–south symmetry.
Water Beneath the Surface of Mars, Bound Up in Sulfates
Researchers present maps of hydrogen and sulfur that hint at water locked in hydrous sulfates in Mars's southern hemispheric soil.