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Most of Earth's myths and legends come from alien encounters in ancient times. For example, Stonehenge is a Galvan practical joke and the pyramids were built by Tetramands, with the assistance of humans, as well as Driba and Blukic.[DJW 2]
Professor Paradox showed Ben, Gwen, and Kevin a possible future where Earth became a desert wasteland after the Trans-Dimensional Monster got out of Los Soledad. Fortunately, this future was prevented by Ben.
Rex Salazar lives in a parallel version of Earth where E.V.O.s and the organization Providence exist and nearly every living being is infected by Nanites. Ben was taken to this Earth during a battle with Alpha.
Ben 10: Protector of Earth
Earth is the main setting, with the Tennysons traveling all over the United States to battle enemies.
Ben 10: Ultimate Alien Cosmic Destruction
- Dolphins[DJW 3]
- Interdimensional white lab mice[DJW 4]
- Komodo Dragons
- Komodo (altered)
- Various other cryptids
- Galvanic Mechamorph
- Various citizens of Undertown
- Verdona (formerly)
- Earth is an open system.
- Earth is located in a key strategic location for taking over the galaxy.
- Earth is the richest source of iron in the universe.
- Aliens are not allowed to urinate in Earth's bushes as it could lead to an environmental catastrophe.
- "Htrae", which is Earth spelled backwards, is apparently Earth's secret true name.
- Ma Vreedle refers to the Solar System as the "Sol System." 
- 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.
- ↑ Magister Labrid
- ↑ Ben 10 Returns: Part 1
- ↑ Collect This
- ↑ Solitary Alignment
- ↑ Inspector 13
- ↑ Max Tennyson
- ↑ Inferno
- ↑ Azmuth's Father
- ↑ Ben 10: Destroy All Aliens
- ↑ Fight at the Museum
- ↑ The Frogs of War: Part 2
- ↑ Paradox
- ↑ Ben 10-Generator Rex: Heroes United
- ↑ 14.0 14.1 Rook Blonko
- ↑ The Frogs of War: Part 1
- ↑ Vulkanus
- ↑ The Galactic Enforcers
- ↑ Driba
- ↑ Blukic and Driba Go to Mr. Smoothy's
- ↑ Where the Magic Happens
- ↑ The Mother of All Vreedles