From the March 2009 issue

If Io continues to erupt at the fast rate it does now, could all of the moon’s insides end up on the surface, causing it to collapse onto itself and start the process all over again?

Tony Royal, Daytona Beach, Florida
By | Published: March 23, 2009
Io does not erupt a large enough volume of material fast enough to hollow out its interior and then collapse.