Was this fluctuation real, or was it merely a glitch in the equipment used to measure the decay, induced by the change of seasons, with the accompanying changes in temperature and humidity?

FORBES: Radioactive Decay Rates May Not Be Constant After All

Gore's movie has a visual that purportedly shows temperature changes over the last 650, 000 years correlating closely with levels of carbon dioxide, suggesting that CO 2 must be the culprit.

FORBES: Fantasy Fears

They will analyse the planet's lower atmosphere, looking for telltale gases associated with volcanic activity, and for related temperature changes.

ECONOMIST: Planetary science

Those who can handle abrupt temperature changes can try the four room Nun Path, a variation of hot to cold with variations of humidity, a revival of a Roman regeneration treatment. (although only the most stalwart should attempt the Frigidarium.) And treatments span the globe, from hammam rituals to Thai and Ayurvedic.

FORBES: Taking The Waters In Italy, Part 2-A Designer Spa In A 13th Century Assisi Convent