From harvesting herring eggs to hunting humpback whales, humans have had a relationship with the world's oceans for more than 100,000 years. In Dig Deep: Connecting Archaeology, Oceans and Us, young readers unearth what our ancestors left behind at archaeological sites around the world and examine how tools, campsites, fishing technologies and even garbage can show us how our ancestors lived and how they used the ocean. These discoveries can unearth clues to help keep our oceans healthier today and in the future.