Many heavy atoms form from a supernova explosion, the remnants of which are shown in this image. NASA/ESA/Hubble Heritage ...

Data from oceans, ice and the air all point to the same thing: rising invisible heat. What experiments are working, and what kinds of trials do we need to stop?

The precursors of heavy elements might arise in the plasma underbellies of swollen stars or in smoldering stellar corpses.