Because in science, sometimes you just have to laugh at the end of a long day:

"Basic research is like shooting an arrow into the air and, where it lands, painting a target."
- Homer Burton Adkins (1892-1949, American organic chemist)

"I have yet to see any problem, however complicated, which, when you looked at it the right way, did not become still more complicated."
- Paul Alderson

"Your theory is crazy...but it's not crazy enough to be true."
- Neils Bohr

"In science one tries to tell people something that no one ever knew before, in such a way that it is understood by everyone. But in poetry, it's the exact opposite."
- Paul Dirac

"Results! Why, man, I have gotten a lot of results. I know several thousand things that won't work."
- Thomas Edison (1847-1931)

"A scientist is a mimosa when he himself has made a mistake, and a roaring lion when he discovers a mistake of others."
- Albert Einstein

"Every honest researcher I know admits he's just a professional amateur. He's doing whatever he's doing for the first time. That makes him an amateur. He has sense enough to know that he's going to have a lot of trouble, so that makes him a professional."
- Charles Franklin Kettering