[Wikipedia-l] Metric v. English

[Jimmy Wales]

I am reviewing the controversial [[New Imperialism]] article.  

One side note is that Tarquin changed 9,000,000 square miles to
23,000,000 square kilometers.  This move was apparently
uncontroversial.

Is that right?  As an American, I frankly confess that the metric
system is a curiosity to me.  9,000,000 square miles, I can grasp,
because I know how long a mile is intuitively.  The kilometer, on the
other hand, is non-intuitive, just an arbitrary length from a
textbook.

Shouldn't we give both, then?