The Voltron machine is actually massive - bigger than King Kong, Godzilla, or even Optimus Prime
It started as an anime series from Japan with a loads of giant robot toys
Lions enable each pilot to be more effective but something weird happens when pilots hop into a different lion from their own...
Voltron won't stay the same shape forever. As the team travels further through the universe, they'll find new Voltron upgrades to make the robot even more powerful.
Shiro pilots the Black Lion and is the oldest member of team Voltron at 25 years old. Pij is the youngest member, at 14 years old. The other members are somewhere in between, but we don't know their ages exactly.
The composer of the Voltron soundtrack has also made music for Gravity Falls, Star vs The Forces of Evil, We Bare Bears, and Fanboy & Chumchum. He makes all his music using different electronic keyboards and synthesizers.
Shiro's mechanical arm came from being captured by Zarkon and then tortured by Zendak as a gladiator. You can see these flashbacks throughout the series
Series 2 starts with the Lions and the Castle getting thrown through a wormhole and separated into the far reaches of space. They are faced with the challenge of having to locate each other, scattered across different planets - but before they can be reunited, they must first survive.