Lightning effects, early 20th-century artwork. At upper left are plant leaf impressions left on human skin by the effects of a lightning strike, and in the main artwork is a depiction of ball lightning. Lightning strikes are capable of creating impressions on surrounding objects of the object struck, in this case plant impressions on humans close to the plants struck by the lighting. Ball lightning is a rare, globular-shaped form of atmospheric electrical discharge that is still not fully understood. Artwork from the 26th volume (second period of 1900) of the French popular science weekly 'La Science Illustree'.
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