Once you enter the dark space where a dramatic spotlight shines on a 100sqm patch of falling water, the sound of the shower and the feeling of moisture in the air immediately gives the familiar impression of being caught in a downpour.

BBC: It is raining indoors in London

The dark sunspots are encircled by brighter areas, so when they are plentiful, the sun shines more brightly than when they are sparse.

ECONOMIST: The sun has gone quiet