SciShow

Dr. Lindsey Doe Talks about Sperm (2013x185)

Ημερομηνία προβολής: Δεκ 02, 2013

Hank sits down with clinical sexologist Dr. Lindsey Doe and talks about 'fighter sperm'. Then Jessi from Animal Wonders comes on to show off her Quaker Parrot the 'monogamous bird'.