For millennia, our relationship with the stars shaped our art, religious beliefs, scientific advances, and even our biology. In this NPR Best Book of 2020, Jo Marchant points out that we have now separated ourselves from the universe, at a dire cost. Taking an inspiring intellectual odyssey, Marchant travels to the caves at Lascaux and to the summer solstice at a 5,000-year-old tomb in Ireland. Along the way, Marchant shares stories of medieval monks grappling with the nature of time, Tahitian sailors navigating by the stars, and Einstein making a breakthrough.