@CNN: Some sounds like “f” and “v” are included in about half of the world’s languages due to a change in our diet that relies on softer foods, a new study suggests https://t.co/whdgl3tOaY

@CNN: Some sounds like “f” and “v” are included in about half of the world’s languages due to a change in our diet that relies on softer foods, a new study suggests https://t.co/whdgl3tOaY