Ancient Oceans

von Julie K Lundgren

24 Seiten, Taschenbuch, ab 8 bis 9 Jahre

Kurzbeschreibung des Verlags

Planet Earth formed over 4 billion years ago. As Earth cooled over millions of years, an ocean formed. Scientists believe this ocean once covered the entire planet. Discover the changes our planet has gone through over time and how those changes affected our oceans.