Of course, everybody's voice varies, but in general male humans develop lower-pitched voices than female humans starting around puberty. Learn why in this classic episode of BrainStuff.
Learn more about your ad-choices at https://www.iheartpodcastnetwork.com

How Can Rhubarb Grow in the Dark?
10:28

How Does the Blue-Footed Booby Work?
08:41

Who Was Helen of Troy?
07:27