Postwar reconstruction is likely the cause of elevated thallium levels, but low-oxygen, high-sulfide conditions keep the material, which is extremely dangerous to mammalian health, from moving into the human food chain.
geochemistry
Posted inResearch Spotlights
在土卫二上寻找生命：我们应该问些什么问题？
在冰冷的海洋世界中，建立在有机化学进化理论基础上的研究框架，可能会比仅仅寻找生命存在的直接证据，带来更深刻的见解。
Posted inENGAGE, News
A Splashy Meteorite Was Forged in Multiple Collisions
The Winchcombe meteorite was recovered, largely from a driveway, just hours after it fell to Earth, preserving evidence that its early relatives could have filled Earth’s oceans.
Posted inFeatures
Confined at Sea at the End of the World
Embedded on a research cruise in the Antarctic, a journalist joins a scientists’ “summer camp.”
Posted inResearch Spotlights
Looking for Life on Enceladus: What Questions Should We Ask?
On icy ocean worlds, a research framework built around the theory of organic chemical evolution could surface deeper insights than a hunt limited to direct evidence of life.
Posted inNews
Last Chance Lake Harbors the Highest Known Levels of Phosphate
Bodies of water such as this might have functioned as cradles of life, given their unique biogeochemistry.
Posted inEditors' Highlights
Machine Learning for Geochemists Who Don’t Want to Code
Geochemistry π is an easy-to-use step-by-step interface to carry out common machine learning tasks on geochemical data, including regression, clustering, classification, and dimension-reduction.
Posted inResearch Spotlights
Comparing Carbon-Trapping Capacities of Anoxic Basins
Low-oxygen regions in the ocean could be prime spots for sequestering biomass—a potential strategy for fighting climate change. But each site has its pros and cons.
Posted inNews
Olivine May Have Given Life a Jump Start
A mineral common throughout the solar system nudges a reaction that produces sugar molecules from formaldehyde.
Posted inEditors' Highlights
New Constraints on Sulfur Cycling in the Prebiotic Earth
Experiments constraining rates of aqueous reactions and photolysis coupled with a global model constrain the abundance and chemical speciation of sulfur in early Earth’s atmosphere and oceans.