“Why is the human skull as dense as it is? Nowadays we can send a message around the world in one-seventh of a second, but it takes years to drive an idea through a quarter-inch of human skull.”
- #wikiquote
- #saying
- #undated
- #lang:en
← Charles F. Kettering timeline
“Why is the human skull as dense as it is? Nowadays we can send a message around the world in one-seventh of a second, but it takes years to drive an idea through a quarter-inch of human skull.”
Captured 2026-08-18 from Wikiquote (en). The archived copy is preserved so this citation survives link rot.