The year 1917, 1937, 1956, 1968, 1979, and 1990 are all notable for th

Competition Mode Question The year 1917, 1937, 1956, 1968, 1979, and 1990 are all notable for the occurrence of both popular uprisings and near-maximum sunspot activity. During heavy sunspot activity, there is a sharp rise in positively charged ions in the air people breathe, and positively (…)