Few topics in geobiology have been as extensively debated as the role of Earth's
oxygenation in controlling when and why animals emerged and diversified. All currently …

Abstract Otavi Group is a 1.5–3.5-km-thick epicontinental marine carbonate succession of
Neoproterozoic age, exposed in an 800-km-long Ediacaran− Cambrian fold belt that rims …

Earth's surface has undergone a protracted oxygenation, which is commonly assumed to
have profoundly affected the biosphere. However, basic aspects of this history are still …

The origin of modern eukaryotes is one of the key transitions in life's history, and also one of
the least understood. Although the fossil record provides the most direct view of this process …

Eukaryogenesis—the process by which the eukaryotic cell emerged—has long puzzled
scientists. It has been assumed that the fossil record has little to say about this process, in …

Biomineralization has emerged as a novel and eco-friendly technology for artificial mineral
formation utilizing the metabolism of organisms. Due to its highly efficient urea degradation …

The geological timescale before 720 Ma uses rounded absolute ages rather than specific
events recorded in rocks to subdivide time. This has led increasingly to mismatches between …

Abstract The rhenium-osmium (187Re-187Os) system is a highly versatile chronometer that
is regularly applied to a wide range of geological and extraterrestrial materials. In addition to …

While there is significant data on eukaryogenesis and the early development of the
eukaryotic lineage, major uncertainties regarding their origins and evolution remain …

Oolitic ironstones are iron-rich and chert-poor sedimentary rocks containing concentrically
coated grains composed of iron (oxyhydr) oxides and iron phyllosilicates that offer a unique …