Discover the deep trenches of our planet's vast and mysterious oceans! The biggest mysteries live at the very bottom of the ocean, and scientists are learning more every day. Investigate whether the seafloor holds answers to bigger questions about Earth. Created in collaboration with the Smithsonian Institution, this STEAM book will ignite curiosity about deep-sea life and the formation of ocean trenches. It features a hands-on STEAM challenge that is perfect for makerspaces and walks students step-by-step through the engineering design process. Make STEAM career connections with career advice from actual Smithsonian employees working in Earth and space science fields. Explore advanced science topics with older readers with this STEAM book that is ideal for secondary students or ages 10-14.