E. Bleuler and M. Gabriel1 have recently shown that potassium-40 decays radioactively in two different ways. Apparently a potassium-40 nucleus can decay either by emitting a beta-ray, or by ...

Bananas, though radioactive due to potassium-40, don't pose health risks. The radiation from one banana is minimal compared to daily exposure from various sources. Interestingly, humans are more ...

And when potassium-40 decays, it naturally produces a positron as a part of the process. Short lives, mostly. Despite their ease of creation, antimatter particles don’t stick around for long.

MY investigations on the effect of potassium-40 upon the growth and development of Aspergillus niger lead to the conclusion that the radioactivity of potassium-40 (normally present in organisms ...

Potassium-40, with its half-life of 1.3 billion years, could have supplied enough radioactive heat to keep the core hot enough to maintain the magnetic field for billions of years.

Radioactive potassium, common enough on Earth to make potassium-rich bananas one of the “hottest” foods around, appears also to be a substantial source of heat in the Earth’s core, ...