A recent New Scientist article explored the numeric parameters
describing numerous natural structures.
Specifically, the leading digit of such parameters has a rather high
probability of being "1". This is a 'law' ascribed to Benford.
You might easily suppose that the numerals 1 to 9 have an equal
opportunity to take the first position. They do not.
A reader's note followed up with a plausible reason why this should be:
For an observation concerning something that tends to a power law,
the logarithmic spacing between adjacent digits is unequal.
The space between 1 and 2 on a log scale is a factor of two,
the space between 8 and 9 is a factor of 0.13
[John Burns, Oxford]