34497a3fe0ef52949a1ba8e99894ed69 This article belongs to the Classic Continuity.

Earth, also known as Terra, is the home planet of Humans and many animal life forms. It is a Level 2 planet. After The Frogs of War: Part 2, aliens started living on the surface of Earth with humans.

Earth and Moon

Earth and the Moon as seen in Ultimate Alien

Video Games

Ben 10: Protector of Earth

Earth is the main setting of the game, with the Tennysons traveling all over the United States to battle enemies.

Ben 10: Ultimate Alien Cosmic Destruction

Earth is the main setting of this game too, being the location where the Potis Altiare was sent by the Galvan when it crashed on Earth many years ago.

Alternate Future

A possible future Earth was seen in Paradox, when Professor Paradox showed Ben and his team what will happen if the Trans-Dimensional Monster gets out of Los Soledad. This Earth appeared to be a desert wasteland. This future was prevented by Ben.

Ben 10-Generator Rex: Heroes United

A parallel version of Earth exists where E.V.O.s and the Providence exist and nearly every living being is infected by Nanites.

Notable Inhabitants

Non-native species


  • Earth is an open system.[2]
  • Earth is the richest source of iron in the universe.
  • Earth is in a key strategic location for taking over the galaxy.[2][3]
  • Most of Earth's myths and legends come from alien encounters in ancient times.[4]
  • Aliens are not allowed to urinate in Earth's bushes as it could lead to an environmental catastrophe.[5]
  • According to Retaliator, the pyramids were built by the Tetramands.
  • When Azmuth first discovered Earth (as he revealed he did in Solitary Alignment) he called it "Terra".[7][8][9]
    • Since then, many aliens refer to Earth as "Terra" and Humans as "Terrans".[10]
  • Stonehenge is a Galvan practical joke.[11]
  • Ma Vreedle refers to the Solar System as the "Sol System." [12]
  • Earth having dolphins, white lab mice and humans as sentient life forms is a reference to The Hitchhiker's Guide To The Galaxy by Douglas Adams, in which dolphins and white mice are more intelligent than humans.


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