Driven by the Earth's
spin on its axis,
the diurnal cycle
of night and day is a powerful driver of variability
of weather, as we examine in Climate
Science. In Climate History
we look into how human beings tend to organize their daily activities
(including eight hours of sleep) around the diurnal cycle of
day and night. In Resources, you
will find links to real-time and time-relevant information about
Note that the 24 hour period of a day does not fit neatly into
the "powers of 10" exponential approach to years.
A day is actually 0.0027 of a year, more than two orders of
magnitude less than a year.