This is how little chicks spend much of their time, huddled around their mother’s face. When they’re not staring into her eyes to see what she’s doing, they’re usually resting underneath her, bundled safe and sound, listening to her beating heart. It’s an infinitesimal number of an infinitesimal number of chicks who are lucky enough to have a mother. Even while they are in their eggs, the chicks at some point must feel and hear their mother’s heartbeat. Being able to take naps and sleep listening to the sound of their mother’s heart must be soothing.