Very little is known about sea turtles during their first years at sea, a period described as the sea turtle “lost years”. Filling these data gaps required a new technological approach including the use of small, solar-powered satellite tags and novel tag attachment methods. Data from the first long-term tracks of oceanic stage lost years sea turtles provide new insights to early sea turtle life history and ontogeny, revolutionizing how we now perceive the sea turtle “lost years”