Blinded me with science

I came across the following mindnumbing fact today. It's been intriguing me all day and, in the end, I just had to share.

A cockroach breaks wind every 15 minutes.

Now, my question is, how the hell do they know that?

Is there a scientific study on cockroach flatus somewhere? Did they assign some poor PhD student to sit there with a counter?

And how do they know when a cockroach breaks wind?

Is it audible? Do they measure gaseous levels in a chamber?

And is this hazardous work? Do you get danger money?

Could this be a new career opportunity?

So many questions and, darn it, I want answers!