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 ...

In nature, uranium isotopes are typically found in radioactive equilibrium ... In experiments, very young animals have been found to absorb more uranium into their blood than adult animals when they ...

The D-A model predicts the distributions (profiles) of uranium and U-series isotopes across a bone section. It has been shown how these distributions reflect the uranium uptake history of a bone, with ...

This isotope of hydrogen is called deuterium ... Nuclear power plants harness the energy of countless atoms of uranium splitting apart, or fissioning, in a chain reaction. Heavy water can help ...

and the time it takes for one-half of a particular isotope to decay is its radioactive half-life. For example, about 1.5 percent of a quantity of Uranium 238 will decay to lead every 100 million ...