The Radioisotope Timescale

Popular science (SciPop) has a timescale designed to rationaliz biological evolution. Along the way it's picked up several pieces of supposedly supporting evidence, one of which is radiocarbon and radioisotope dating.

Hypothesis 10

IF nuclear decay isn't constant, AND an initial burst of radiation caused the core of the Earth to melt, THEN material from the lower mantle will melt and fall into the molten core which is why it's expanding.

Nuclear Decay

It's impossible to prove that radioisotopes have always decayed at a constant rate throughout history, since the ability to detect and measure radioactive decay is only about 120 years old.