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They won the 2006 Ig Nobel in chemistry!

CHEMISTRY: Antonio Mulet, José Javier Benedito and José Bon of the University of Valencia, Spain, and Carmen Rosselló of the University of Illes Balears, in Palma de Mallorca, Spain, for their study "Ultrasonic Velocity in Cheddar Cheese as Affected by Temperature."

REFERENCE: "Ultrasonic Velocity in Cheddar Cheese as Affected by Temperature," Antonio Mulet, José Javier Benedito, José Bon, and Carmen Rosselló, Journal of Food Science, vol. 64, no. 6, 1999, pp. 1038-41.

WHO ATTENDED THE IG NOBEL PRIZE CEREMONY: The winners delivered their acceptance speech via video recording.

Source:http://www.improbable.com/ig/winners/