http://www.theses.fr/s78117 This is a thesis of one of my teachers. https://www.theguardian.com/science/2017/jan/11/puppies-response-to-speech-could-shed-light-on-baby-talk-suggests-study This is an article less scientific about it. If you want to read more scientific articles about pets you can research on Brill.com, or journavetbehavior.com to get thesis and articles about what you want to read.

I'm a researchers, so i searched: http://www.dukechronicle.com/article/2016/09/methodist-churchs-role-in-electing-university-trustees-ends-this-year NO Comment

To inform your housemate about the critical woman cited at the end of the article, this is sadly really diffiCULT to convince some religious people about the fact that humans are not so different of other mammals...

Truth again, you had a great teacher! This is because mammals have been improved by natural selection, and we carry in our genes the fact that deep sounds/voices are dangerous and might threaten our life, so babies are scared by deep voices until they learn that it's harmless most of the time. I think that this is the first time i'm not being downvoted for telling scientific truth about animals/humans lol

I did'nt say that he is religious, i said that because one "researcher" critics those thesis at the end of the article and i was sure that was because religion.And after some research it is. i was afraid that your mate may say "see there are some critics".i was giving you the weapons to shut him down lol