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Mathilde Cannat on Mid-Ocean Ridges
Oceanic plates are continually manufactured at mid-ocean spreading ridges. But exactly what processes go on at these ridges? It turns out that it depends on what type of ridge it is—fast-spreading or slow-spreading. And that our traditional
Kathryn Goodenough on the Sources of Lithium for a Post-Carbon Society
The lithium-ion battery was invented about 40 years ago, and is now commonplace in a range of products, from smartphones to electric cars. But if we are to meet the carbon emission goals that governments are setting, electrification, and wi
Steve D'Hondt on Reviving a 100-Million-Year-Old Bacterial Colony
The fossil record goes back through the Phanerozoic eon, about 540 million years, and even earlier, into the Ediacaran period. But while the fossils provide incontrovertible evidence of ancient life, the fossils themselves are certainly not
Harriet Lau on the Motions of the Earth on Timescales from Hours to Millennia
The subfield of geology called geodynamics most commonly refers to the motions associated with convection in the mantle. These are slow by human standards and lead to phenomena such as plate motions, seafloor spreading, mountain building, a
Craig Jones on the Iconic Landscapes of the American Westerns
Many hundreds of films have been shot on location in the American West. The rugged, inhospitable landscapes are an integral part of what gives so many American Westerns their distinctive character. Although the region is vast, stretching fr
Claude Jaupart on Whether the Earth is Cooling Down
We know the Earth was born as a baking inferno. So the presence of a relatively cool surface today suggests that the Earth has cooled a lot since it formed. But the very thin crust on which we subsist is not representative of the Earth as a
Peter Molnar on Why the Tibetan Plateau is So High
How can we tell what is happening at the bottom of the lithosphere, especially in one of the most remote places on the planet? Peter Molnar describes how many diverse lines of evidence, from the fossil record to normal faulting point to abr
Katie Stack on Mapping the Geology of Mars with the Perseverance Rover
Katie Stack is Deputy Project Scientist for the NASA Perseverance rover that landed in Jezero crater on Mars in February 2021. A geologist by training and an expert on the Martian sedimentary rock record, she has been mapping the geology of
Jan Smit on Resolving a Single Hour of the Cataclysm That Ended the Cretaceous 66 Million Years Ago
Jan Smit is a paleontologist who specializes in abrupt changes in the geological record. After the discovery of an end-Cretaceous surge deposit in North Dakota, he was part of the team that pieced together the striking evidence it contained
Marie Edmonds on Volcanic Gas
Marie Edmonds is Professor of Volcanology and Petrology at Cambridge University. She studies the cycling of volatile elements such as carbon between the atmosphere and the mantle and the role that volatiles play in melting, magma transport,
