One howls on the prairie the other prowls on the hairy.
One is relevant and can get you a job. The other you went to university for.
Radioactive elements last longer.
To the microwave.
They're in-fur-iated.
It rhymes when they say. "Keep at eye out for a coyote."
HE'S LIVING ON A PRAIRIE
One prowls on the hairy and the other howls on the prairie!