Retro science fiction t-shirts

ShirtA few months ago a friend told me that the main problem with most science fiction stories is that they violate the basic laws of the universe. To show my agreement, the next time I see him I'll be wearing the stylish T-shirt at right.

The caption reads "Speed limit: 186,000 miles per second. It's not just a good idea, it's the law."

Anyone looking for this and other retro SF shirts should go to the Retropolis Transit Authority. And a hat tip to SF Signal for first pointing me to this great site.