The title got mangled from the grammatically correct "40 years ago, Calvin and Hobbes' raucous adventures burst onto the comics page" (though some of us learned

The title got mangled from the grammatically correct "40 years ago, Calvin and Hobbes' raucous adventures burst onto the comics page" (though some of us learned "Hobbes's" in elementary school) to "40 years ago, Calvin and Hobbes' burst onto the page" (the ' definitely doesn't belong).