The End of the World as we Know it
A physicist is giving a lecture at a Jewish seniors residence and explaining that in 4 and 1/2 billion years the sun will exhaust itself of fuel and burn out and all life at we know it in the solar system will end.
Upset, Saul Epstein yells out, "Is there anything we can do professor? Can we form any congressional committees, or donate money for research?"
The physicist responds, "Sir, why are you so upset? This won't happen for 4 and a half billion years?"
"Oh, thank God," says Mr. Epstein. "I thought you said it would happen in 4 and a half million years."