Prochlorococcus and Synechococcus are the two most abundant photosynthetic organisms
on Earth, with a strong influence on the biogeochemical carbon and nitrogen cycles. Early …

Machine learning (ML) refers to computer algorithms that predict a meaningful output or
categorize complex systems based on a large amount of data. ML is applied in various …

Extreme warming at the end-Permian induced profound changes in marine biogeochemical
cycling and animal habitability, leading to the largest metazoan extinction in Earth's history …

Scientific evidence is abundantly clear and convincing that due to the current trajectory of
human-derived emissions of CO2 and other greenhouse gases, the atmosphere and ocean …

Abstract Nitrous oxide (N 2 O)—a product of microbial nitrogen metabolism—is a compelling
exoplanet biosignature gas with distinctive spectral features in the near-and mid-infrared …

Atmospheric oxygen (O 2) concentrations likely remained below modern levels until the
Silurian–Devonian, as indicated by several recent studies. Yet, the background redox state …

Abstract The 2‐methylhopanes (2‐MeHops) are molecular fossils of 2‐
methylbacteriohopanepolyols (2‐MeBHPs) and among the oldest biomarkers on Earth …

A new box model is employed to simulate the oxygen-dependent cycling of nutrients in the
Peruvian oxygen minimum zone (OMZ). Model results and data for the present state of the …

Abstract Oceanic Anoxic Events (OAEs) are important geological events that may be
analogues to future climate-driven deoxygenation of our oceans. Much of the global ocean …

Bacterial hopanoid lipids are ubiquitous in the geologic record and serve as biomarkers for
reconstructing Earth's climatic and biogeochemical evolution. Specifically, the abundance of …