4.6 billion years ago, Earth was formed, and many lifeforms came into being as the lands and seas stabilized: unicellular organisms, multicellular organisms, relatives of fish who lived in the sea, animals who climbed up onto land… Explore the fascinating evolution of bones, as well as how humans are connected to our ancestors from the primordial sea via the ocean we always carry inside us. The best part for aspiring young scientists might be that the story isn’t over yet!