Now, thanks to fossilized tooth enamel, we're a step closer to an answer. In a study with several other co-authors, we measured nitrogen isotopes in the enamel from fossilized teeth belonging to the ...

Scientists analyzed fossilized tooth enamel from Australopithecus specimens dating back 3.4 million years. By examining nitrogen isotopes, which indicate an animal’s position in the food chain, they ...

A study of ancient stromatolites reveals that ammonium reservoirs in early Earth's oceans, likely influenced by volcanic ...

A new source of nitrogen has been discovered. Researchers from RPTU University Kaiserslautern-Landau in southwestern Germany ...

Scientists at Nottingham Trent University found that food from people—directly or indirectly—contributes an estimated 35% of ...

For decades, scientists have believed that meat-eating drove human evolution, particularly our enlarged brains.

A team of marine biologists, environmental researchers and land management specialists affiliated with several institutions ...

Dr. Ashley Martin: "A large ammonium reservoir would have been very beneficial for early life, providing the nitrogen source ...

Naturally-occurring stable isotopes of water and other substances are used to trace the origin, history, sources, sinks and interactions in water, carbon and nitrogen cycles. Stable isotopes can also ...

A small but fascinating collection of Megalodon teeth exhibit deep bite marks from other Megalodons, raising questions about ...

Stable isotopes have helped uncover migratory routes, trophic levels, and the geographic origin of migratory animals. They can be used on land as well as in the ocean and have revolutionized how ...

We used coral-bound nitrogen isotopes to analyse a range of modern symbiont-bearing and symbiont-barren corals across various environments. The measurements of these isotopes can be used to ...