Ambigrams

What's an ambigram?  An ambigram is text written so that it has symmetry -- meaning that if you rotate it, it will read the same upside down as it does right-side up. 

Ambigram of TUVA

Tuva ambigram (c) 1999 by Hud Nordin

Ambigram of FEYNMAN

Feynman ambigram (c) 1999 by Hud Nordin