"Thanks to enzymes, humans are solar-powered." 24th First Annual Ig Nobel Prize Ceremony & Lectures. [more inside]
In 2000, Improbable Research sent a variety of regulation-violating items through the mail to see what would make it.
"I attempted to repeat the experiment, however once my assistant discovered that I didn’t really have any tuna, she declined to participate in any further tests."
The Pliocene Pussy Cat Theory (which originally appeared in The Annals of Improbable Research) argues that the human ancestor Australopithecus domesticated cats for hunting, defense and harvesting static electricity to make it easier to climb trees. The theory, which was proposed by Lorenzo Love, is a parody of the Aquatic Ape Hypothesis (which is critiqued here and in shorter form here). Whether you know about the Aquatic Ape Hypothesis or not, the Pliocene Pussy Cat Theory, and Love's follow-up, the Subterranean Ape Theory, will completely alter your understanding of human evolution.
Eric Schulman from the Annals of Improbable Research asks, Can Fame Be Measured Quantitatively?.