But, in the spirit of rebranding, it is interesting to note that the main source of Earth's internal heat comes from the radioactive decay of uranium, thorium and potassium-40 that keeps the outer ...

The table below shows the fraction by weight of the three isotopes in any quantity of natural uranium, their half lives, and specific activity. The half life of a radioactive isotope is the time taken ...

Apparently, whatever process created the uranium on Earth, it all appeared at the same time (and has been decaying ever since) because no matter where you mine uranium today it is about 99.275% U-238.

Boltwood studied this concept of "radioactive series," and found that lead was always present in uranium and thorium ores. He believed that lead must be the final product of the radioactive decay ...

CAPE’s Dr. Laurette Geldenhuys told the crowd that uranium and fracking bans must be upheld to “protect the health of Nova Scotians.” She said uranium mining can release uranium’s natural decay ...

For example, about 1.5 percent of a quantity of Uranium 238 will decay to lead every 100 million years. By measuring the ratio of lead to uranium in a rock sample, its age can be determined.