It's beginning to look a lot like . . .

Chemistry!  The department got into the spirit of the season and decorated a "Chemis-Tree," complete with goggles, ornaments, and garlands of DNA strands.

Sing with me!  (To the tune of "Jingle Bells")
Hydrogen, hydrogen,
you have one proton
you are the most abundant element
in the entire world!
Oh, Hydrogen, hydrogen
you make life possible
but if a humans breath too much of you
then they will surely die.

Maybe not the most jolly song, but it is both knowledgeable and precautionary.

Merry Christmas from the Chemistry department!