Follow the New Horizons spacecraft as it makes its historic flyby of one of the furthest objects in the solar system. Follow as they plan and execute maneuvers to allow the spacecraft to target a Kuiper Belt object known as Ultima Thule.
Horse riding played a key role in human expansion and civilization. But when and how did people first master these animals? Scientists use archaeology and genetics to uncover clues about the first horse riders and how they shaped the world.