Sept. 19 (UPI) -- The Annals of Improbable Science announced this year's slate of Ig Nobel Prize winners, including researchers who painted cows like zebras and a team who analyzed the pizza preferences of lizards.

The 35th First Annual Ig Nobel Prize Ceremony was held Thursday evening in Boston and featured Nobel laureates handing out awards for scientific research that makes "people laugh, then think."

"The prizes are intended to celebrate the unusual, honor the imaginative -- and spur people's interest in science, medicine and technology," the official website states.

This year's Literature Prize was awarded posthumously to William Bean, "for persistently recording and analyzing the rate of growth of one of his fingernails over a period of 35 years."

The Psychology Prize went to Marcin Zajenkowski and Gilles Gignac, who analyzed how receiving high IQ scores relates to "temporary state narcissism."