>it is also decreasing in mammals across the board in North America. North America is a big place and there are a hell of a lot of different mammals in it. Are

>it is also decreasing in mammals across the board in North America. North America is a big place and there are a hell of a lot of different mammals in it. Are there really enough people out there taking regular and reliable measurements of testosterone levels in a wide variety of species over a wide geographic area such that we have a representative sample?