In this activity, you will simulate radioactive decay by flipping coins. Coins that land tails-up "decay," and coins that land heads-up remain the same.

Here’s a hypothesis for you: radioactive decay varies over time, possibly with a yearly cycle. [Panteltje] decided to test this hypothesis, and so far has two year’s worth of data to comb over.

"Old textbook knowledge reconfirmed: Decay rates of radioactive substances are constant." ScienceDaily. ScienceDaily, 10 October 2014. <www.sciencedaily.com / releases / 2014 / 10 / 141010083857.htm>.

WEST LAFAYETTE, Ind. - Researchers may have discovered a new method to predict solar flares more than a day before they occur, providing advance warning to help protect satellites, power grids and ...

In the EXO-200 experiment, physicists monitor a copper cylinder filled with 200 kilograms of liquid xenon-136, an unstable isotope that, theoretically, can undergo neutrinoless double beta decay.