A very basic question that is stalking me for more than 20 years. Every popular science cosmology book states: A variation in temperature in the CMB of 1 part in 100.000, and then, from place to place or even from point to point. And then the WMAP picture. Everywhere hot en cold spots many times greater than:from point to point. Can anybody explain what is the relation? Or what is the flaw in my longtime thinking? Is 1 part in 100.000 not 1/100000 th (I doubt it)?