For the longest time, I've been unable to get the irony of the old Sinclair gasoline station signs out of my head. The double-entendre of the "dinosaur" is just too delicious, particularly when applied to (take your choice): petroleum / global warming / large automobiles / SUVs / heedless drivers.
Combining my love of ironic humor with my love of word play, I've mashed-up the old Sinclair sign a bit, finding a new anagrammatic interpretation of the letters, giving ol' Apato a little bit of personality and throwing in a fiery asteroid for good measure (this last element, I must admit, was inspired by Olivia Judson's blog on the New York Times website.)
There are two hi-rez PDF versions, one with a background field, one without (the low-ink version, for those of you printing your own T-shirts on the inkjet printer.) Enjoy, and if you make up some shirts, send me some photos of yourselves!