Pikaia!

"Pikaia!" unfolds in a future where Earth is no longer capable of supporting life, forcing humanity to migrate to space colonies. Within this setting, the story centers on Vince and Hana, who are researchers involved in the Cambrian Project. Their primary objective is to find the Lost Code, a crucial element believed to hold the key to restoring Earth to its former glory. They are aided in their quest by Pikaia, a creature of significance. The narrative follows their efforts to travel back in time to the Cambrian era, a period in Earth's history, with the ultimate goal of reclaiming their lost home and returning to a habitable planet. The anime explores themes of environmental restoration, the importance of the past, and the enduring human desire for a home.