Mantle rocks in Papua New Guinea contain curious geochemical signatures that scientists have traditionally interpreted as evidence of billions-year-old melting. New evidence suggests otherwise.
Scientists not only synthesized davemaoite but deformed it at lower mantle conditions. They found its strength and viscosity to be substantially lower than those of other minerals that make up the lower mantle.
A new resource may help match artifacts with their original stone sources—“a really a niche part of archaeology that requires geological expertise.”
Ancient Polynesian voyagers sailed thousands of kilometers with no maps or compasses; they followed nature’s clues. Using the same tools, the Moananuiākea Voyage will set sail from Alaska and circle the Pacific.
Geochronologists are finding fresh approaches to familiar methodologies, especially by zapping rocks with lasers to tackle classic Precambrian problems.
Scientists studying South Pacific earthquakes suggest that an ultralow-velocity zone at the core-mantle boundary may be a remnant of a molten early Earth.
To commemorate the 400th anniversary of the Pilgrims’ crossing, a ship guided by an AI captain will embark on the same journey, doing science along the way.
Concrete, used in everything from streets to skyscrapers, needs sand, often mined from active rivers in developing countries with little oversight. Researchers can now use satellites to keep watch.
In Peru, gold mining harms rain forests and human health. Satellite data can now track forest recovery in protected areas and the migration of informal miners to less regulated areas.
Microplastics get into our bodies, potentially altering how certain cells convert sugar into energy, especially in the gut. Continued ingestion could cause chronic problems.