Possible Experiment
The black widow gets its famous name due to the fact that the female black widow consumes the male black widow after mating. Until recently, it has been thought that this was just the constant cycle of life for the black widow spider. It has been recently discovered that male black widows choose fatter mates with the hope that they will be able to escape easier. Not is the male black widow spider able to see if his mate is fat or not, but he is able to detect this based upon an enzyme that the female secretes on her web. I think one possible experiment to see if this is always true could be to first present the web of a fat black widow, and a thin black widow to a male black widow spider looking for a mate. If the male black widow were to choose the web of the fatter female enough to eliminate any chance error, this theory could be proved correct. To discover how successful a male black widow spider is when choosing a fatter mate rather than a thinner one, we could record the fatality rate of reproduction. After collecting data from a number of different black widow spiders, I believe the data would be conclusive enough to prove the hypothesis that male black widow purposely choose fatter mates with the hope of improving their chance of survival.