hypothesis

Testing this hypothesis, one experiment found that a certain kind of biting fly avoided horses covered in striped and checked rugs, compared to those in solid grey.

A second hypothesis proposes that SAD isn’t related to the duration of melatonin release, but rather to a complete shift in the timing of circadian rhythms during winter.

They're going to be attacks on the most fundamental and important questions of the day, whether it's the Riemann hypothesis, Navier-Stokes or P versus NP, just to pick a few.