There is no doubt that radium is transformed spontaneously into an ACTIVE GAS, radon, emitting at the same TIME alpha particles, or helions.

Quantum physics is QUITE interesting. All these TINY particles are there as much as they're not there. That to me is very, very interesting. And how our thoughts CHANGE the OUTCOME of an experiment, I think that's all quite spiritual.

When I RECEIVED my B. S. degree in 1932, only TWO of the FUNDAMENTAL particles of physics were known.

Laboratory experiments, FIELD observations and atmospheric modeling calculations have now ESTABLISHED that chemical reactions occurring on PSC particles PLAY a CENTRAL role in polar ozone depletion.