To help compare orders of magnitude of different times this page lists times between 10−15 second and 10−12 second (1 femtosecond and 1 picosecond respectively). A femtosecond's one billionth of one millionth, or one quadrillionth of a second. For context, a femtosecond's to a second, what a second's to about 32 million years. To give another example, one femtosecond compared to one second's like the diameter of a human hair relative to the distance between the earth and moon. See al… (More on Femtoseconds)