Though full of rich minerals and life, Earth has been safe from Zarkon's rule for over the past ten thousand years that his empire has been spreading, existing just out of his reach. So far, it has not been involved in the conquest of the universe, but was where the Blue Lion had been hidden for ten thousand years. Carvings on the cave walls suggest sapient people were aware of the Lion's presence in the past, and also suggested an event would be happening on a certain night, which coincided with Shiro's return to Earth.
The race of people native to Earth are called Humans. This futuristic Earth is described as existing in the not-so-distant future where all countries are at peace, working together, and humans are largely multi-ethnic, making it rare for someone to trace their lineage back to a single country of origin.
The Galaxy Garrison is a military organization with the purpose of training promising cadets to be astroexplorers. It has a training facility located in a desert on this futuristic Earth that all of the current Paladins of Voltron have at some point attended.
The Garrison is responsible for the launch of the Kerberos Mission with the crew of Shiro, Samuel Holt, and Matthew Holt. According to Pidge, it takes the futuristic technology of Earth spacecrafts "months" to reach Kerberos. Samuel Holt implies the total intended mission length would be two months when he describes how the crew will be eating freeze-dried peas for that amount of time. The Blue Lion and pursuing Galra warship travel from Earth to Kerberos in a matter of moments. To contrast, New Horizons, launched in 2006, took 9.5 years to reach Pluto. For this futuristic Earth, the Kerberos crew were the first humans to travel as far as they did.
- Keith's Father
- Colleen Holt