Thomas cited wildlife studies in Minnesota and Europe showing that animals at the top of food webs had lower concentrations than animals at the bottom. (scientificamerican.com)
I am convinced, from wildlife studies and from what I have observed in my practice, this is due to the exposure of female embryos to xenobiotics, environmental pollutants that chemically act like estrogen on the developing baby's tissues. (fullhealthsecrets.com)
Wildlife Acoustics has been working for years on developing algorithms for wildlife study using software based on similar concepts to speech recognition software; or in this case, tweet recognition. (treehugger.com)