We use a new construction of an o-minimal structure, due to Lipshitz and Robinson, to answer a question of van den Dries regarding the relationship between arbitrary o-minimal expansions of real closed fields and structures over the real numbers. We write a first order sentence which is true in the Lipshitz-Robinson structure but fails in any possible interpretation over the field of real numbers.
"A question of van den Dries and a theorem of Lipshitz and Robinson; not everything is standard." J. Symbolic Logic 72 (1) 119 - 122, March 2007. https://doi.org/10.2178/jsl/1174668387