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One of my new favorite webcomics is Ninja Nun (http://www.robertahoyt.com/Comic92.html). Click on the crossed rulers below the comic and start from the beginning. No, it's not science based, but I happen to know that artist has a respectable pedigree in science - Robert Anson Hoyt is a published science fiction author, and named for the SF author Robert A. Heinlein (R.A. Hoyt having been born on R.A. Heinlein's birthday). He comes from a family of SF writers and is himself a pre-med student. In fact, he has even been known to refer to himself as a "lab rat"!
If there is any doubt that Robert A. Hoyt has a wicked sense of humor, check out the comics immediately following and preceding the one linked above, then check out this highly appropriate bonus comic (http://www.robertahoyt.com/Bonus3.html). Yes, Robert loves ties. No, we couldn't get him to stop wearing them even in the lab, cleaning rat cages. He'll make a fine surgeon someday with his attention to detail and cutting wit.
So sharpen your ruler, sit back and enjoy the adventures of Sister Agnus Day, the "Ninja Nun."