The ancient stuff the archeologist digs up is useful.
Have you ever tried to peel an elephant
3, duh. (My ex's 9 year old little sister told me this joke, and followed is up with: "and YOU'RE the math guy!" >< Burned.)
Old Bay
Take his spade away.
Because they love digging up the past.
Someone whose career is in ruins.
His career was in ruins.