I love this periodic table sweater from This and That. She knitted it for her husband, a microbiologist in the pharmaceutical industry.

The sleeves have fungi on one sleeve and bacteria on the other. His sweater was a hit at work and he was invited to give special showings in the chemistry labs.

She’s even provided a chart for the sweater, though she warns that it’s slightly out of date with reference to the newest elements.
[ via SisterDiane ]