BAH! This looks amazing

BAHFest , the Festival of Bad Ad Hoc Hypotheses, is a competition to develop “well-argued and thoroughly researched but completely incorrect evolutionary theory.” The whole thing was originally proposed in a Saturday Morning Breakfast Cereal strip proposing that human infants have been evolutionarily optimized for long-distance dispersal by catapult.

Coming up with “obviously wrong” scientific hypotheses is clever because it helps us think about why, exactly, we choose to believe the hypotheses that we do, and how we use (and misuse) evidence to make those judgements. My personal favorite example is a 1983 article, published in the journal Evolution, which evaluates all the possible reasons that natural selection has made offspring smaller than their parents [PDF]—smaller offspring are easier to hide, cheaper to make, easier to disperse, and easier to control in the event that their interests conflict with their parents’—but completely (and deliberately) misses the obvious, actual reason.

Last year’s BAHFest winner, Tomer Ullman, proposed that babies cry because the irritating, high-pitched noise helps prepare their caretakers for battle:

The next iterations of BAHFest are scheduled for 25 October in San Francisco, and a date to be announced in Boston.


Ellstrand NC. 1983. Why are juveniles smaller than their parents? Evolution. 37(5): 1091-4. doi: 10.2307/2408423.