(CNN) Pizza might protect against cancer, why wombats poop in cubes and a diaper changing machine that can be used on human babies -- these are just some of the research and inventions awarded at this year's Ig Nobel Prizes, a spoof of the actual Nobel Prize awards.

The Ig Nobels are "intended to celebrate the unusual, honor the imaginative — and spur people's interest in science, medicine, and technology," according to its website.

Even if the science does sound, well, hilarious.

Organized by the magazine Annals of Improbable Research, the awards have been going on for 29 years, always celebrated in September with a gala held at Harvard University. Winners accept their prizes from "genuinely bemused genuine Nobel Laureates," the website reads.

The winners are always sure to cause a few laughs, and this year's are no different.

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