The birth of a younger sibling is not just beautiful
As a society, we're shown a lot of images of happy older siblings welcoming their newborn sister or brother to the world. A new analysis of (ape) urine shows that isn't the whole story.
As a society, we're shown a lot of images of happy older siblings welcoming their newborn sister or brother to the world. A new analysis of (ape) urine shows that isn't the whole story.