The most active areas in the untreated animals, compared with the controls, were a part of the pre-frontal cortex, and also the amygdala an almond-shaped structure deep in the brain that is believed to be the seat of emotion.

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"Today the guard has evolved into a socio-military-political-economic force with influence reaching deep into Iran's power structure, " the CFR says, noting that several current and former IRGC members have been appointed to positions as ambassadors, mayors, undersecretaries, provincial governors and cabinet ministers.

CNN: Why Iran unrest is not revolution re-run

Infra-red observations, which can see deep into Jupiter's atmosphere, suggest that the merged storm's structure differs significantly from that of its two precursors.

ECONOMIST: Comparative meteorology