What is the numenera?

From the AMA pile, Surface rfl says:

In a recent interview, among lots of superb stuff (great companions concepts! can we call the ball of goo... Ballte? Goolte? no? ..damn...), - ive noticed this line:

- "Magic" in Numenera is performed by tapping into the ubiquitous numenera around you--even in the air and the dirt--and using it to reshape the world. -

I know thats most likely a convenient background lore explanation explanation and i dont expect "magic" to be realistically explained, but im c...