Heavy actinides—elements at the bottom of the periodic table, after plutonium—are radioactive, rare and chemically complex, ...

The skeletons of over 100 prehistoric rhinos have been found at Ashfall Fossil Beds in northeast Nebraska, but why were there ...

The oxygen-deficient zone expands and contracts more often than assumed "With an ensemble of coral cores we were able to generate multiple time series of stable nitrogen isotopes covering the past ...

Scientists have discovered where Earth's water comes from, and say that it wasn't brought to the planet by asteroid impacts after all.

Researchers in the United States have successfully characterized a promethium coordination complex for the first time. This development could pave the way for improved understanding and applications ...

Over 4.6 billion years ago, Earth took shape from a spinning cloud of dust and gas surrounding the young sun. Tiny particles ...

These results allowed us to explore the scope and limitations of using carbon and oxygen stable isotope measurements on sequentially sampled camelid teeth to identify seasonal mobility patterns within ...

One of the three mass spectrometers in the laboratory is also equipped with a Kiel IV carbonate device, which allows measurement of conventional stable isotopes of carbon and oxygen on small samples ...

(4) Measurement of oxygen–carbon isotope values of collected carbon dioxide gas using a Finnigan Model MAT252 Stable Isotope Mass Spectrometer. The Chinese national standard for calcium carbonate ...