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Records of the recordings of crossbill birds in a lab at PLU on Friday, June 24, 2011.

Kirsten Paasche '13, sifts through the recordings of crossbill birds in a lab at PLU on Friday, June 24, 2011.

Kirsten Paasche '13 looks for matching notes of crossbills songs at PLU on Thursday, June 30, 2011.

Kirsten Paasche '13, and Julyie Smith search for matching notes of crossbills songs at PLU on Thursday, June 30, 2011.

Bouncing frozen rubber ball at Deserts and Demos sponsored by the Chemistry Club at PLU on Monday, April 18, 2011.

Maddison Bray, a junior at Bethel High School, reacts after crushing a liquid nitrogen frozen flower at Deserts and Demos sponsored by the Chemistry Club at PLU on Monday, April 18, 2011.

Rubber balls frozen with liquid nitrogen frozen at Deserts and Demos sponsored by the Chemistry Club at PLU on Monday, April 18, 2011.

Chrushed frozen flower at Deserts and Demos sponsored by the Chemistry Club at PLU on Monday, April 18, 2011.

Assistant Professor of Chemistry Justin Lytle demonstrates a chemical reaction to create a mirror coating at Deserts and Demos sponsored by the Chemistry Club at PLU on Monday, April 18, 2011.

James Hoopes '12, and Asst. Prefessor of Chemistry Justin Lytle create a rainbow at Deserts and Demos sponsored by the Chemistry Club at PLU on Monday, April 18, 2011.