Ten people get on a bus, at the next station, eleven get off:
The theologist: A miracle! A miracle!
The biologist: They're breeding
The theoretical physicist: One must have tunnelled in.
The experimental physicist: 10% tolerance is ok
The mathematician: One must go in to make it empty
DEAD OR ALIVE.
Many years ago, Richard Feynman and Carl Sagan were spending some time in North Carolina to attend a scientific conference. North Carolina is well known for its scenery, and as they were driving back through one of the many forests, Feynman proposed that they buy a tent and spend the night in the forest instead of at a stuffy hotel room. They found a local Outdoor World shop and bought a tent. Then they found a beautiful spot along Mile Marker 42 to pitch their tent. They had a supper of beans and Vienna Sausages then hopped in their tent to sleep.
That night Feynman nudged Sagan.
"Look up," he said. "What do you see?"
"Billions and billions of stars," said Sagan.
"Yes, yes," said Feynman. "What can you deduce from these stars?"
"There are billions and billions of stars. If only a fraction of a percent can support life, then surely we are not alone in the Universe."
"No, you idiot! Someone has stolen our tent!"
I'll stop now..