The Earth is the third planet from the Sun and the densest and fifth largest planet in the Solar System, though most of its surface is covered in water. It is also the only known terrestrial object to harbor life. Throughout much of its existence, a power struggle between the Assassin and Templar Orders has shaped many parts of history. The planet was revealed to be held together by mysterious artefacts which, if removed or disturbed, would cause devastating earthquakes and potentially destroy Earth entirely.
Around 75000 BCE, Earth was struck by a coronal mass ejection, causing near extinction for both humanity and the Isu. When a second coronal mass ejection released on 21 December 2012, the Assassin Desmond Miles sacrificed himself to protect the Earth.