Measuring shells and skeletons encased in thousands of limestone samples has revealed that the sheer amount of living stuff in Earth’s oceans changed alongside the diversity of organisms.
sediments
Posted inResearch Spotlights
Coherent, Not Chaotic, Migration in the Brahmaputra-Jamuna River
The channel threads in braided river systems may be more predictable than previously thought.
Posted inScience Updates
Finding Consensus on Arctic Ocean Climate History
Understanding the effects of a “blue” Arctic Ocean on future climate requires a coordinated effort to study Earth’s past warm periods using a variety of classical and cutting-edge methods.
Posted inNews
Tracking the Sediment Carried by the Muddy Mississippi
New research shows that typically, less than 10% of land-building alluvium reaches the Bird’s Foot Delta region, the southernmost reach of the river, where it meets the Gulf.
Posted inResearch Spotlights
Seaweed Surges May Alter Arctic Fjord Carbon Dynamics
Climate change–accelerated seaweed growth could cause seaweed-dependent microbes to proliferate and consume more oxygen, leading to a rise in oxygen-starved zones.
Posted inResearch Spotlights
Mapping the Ocean Floor with Ancient Tides
A new study uses a paleotidal model to trace the formation of carbon-rich mud deposits over thousands of years.
Posted inNews
Avalanches of Microplastics Carry Pollution into the Deep Sea
Scientists observed a once-theorized process ferrying microplastics into the deep ocean.
Posted inNews
Buried Sediments Point to an Ancient Ocean on Mars
Ground-penetrating radar data collected by the Zhurong rover reveal gently sloping sediments in Mars’s northern lowlands that hint at a shoreline.
Posted inNews
El ADN de los sedimentos lacustres revelan el impacto de los peces introducidos
La trucha no nativa ha alterado la diversidad del zooplancton que habita en los lagos de gran elevación.
Posted inOpinions
Expedition 403: Sailing the Last Expedition of the JOIDES Resolution
Early-career geoscientists share melancholy memories about hard science and intangible networks of collaboration.