xkcd is "A webcomic of romance, sarcasm, math, and language." as mentioned on their site.
Summer Glau and/or River Tam are featured in a few drawings or stories.
Click on image for bigger size
The Race (complete story)
Site note :
This work is licensed under a Creative Commons Attribution-NonCommercial 2.5 License.
This means you're free to copy and share these comics (but not to sell them).
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