*Mathematician's Brain*:

Why does this remind me of the spherical cow joke?When physicists write books for the general public, they write about black holes, dark matter, or strings that wriggle like mad. The universe is their subject. Mathematicians write about mathematics and what it all means. Their subject is their subject.

[ ... ]

If "The Mathematician's Brain" does not answer the questions it poses, this is because no other book has answered these questions either. The book's value lies in Mr. Ruelle's description of the curious inner life of mathematicians. Their subject is very difficult. It requires unusual gifts. Physicists may disguise the triviality of their results by bustling about in large research groups. Mathematicians work alone. They are professionally naked.

As a result, many mathematicians have unstable personalities. ...

The USDA once wanted to make cows produce milk faster, to improve the dairy industry. So, they decided to consult the foremost biologists and recombinant DNA technicians to build them a better cow. They assembled this team of great scientists, and gave them unlimited funding. They requested rare chemicals, weird bacteria, tons of quarantine equipment, there was a horrible typhus epidemic they started by accident, and, 2 years later, they came back with the "new, improved cow." It had a milk production improvement of 2% over the original.

They then tried with the greatest Nobel Prize winning chemists around. They worked for six months, and, after requisitioning tons of chemical equipment, and poisoning half the small town in Colorado where they were working with a toxic cloud from one of their experiments, they got a 5% improvement in milk output.

The physicists tried for a year, and, after ten thousand cows were subjected to radiation therapy, they got a 1% improvement in output.

Finally, in desperation, they turned to the mathematicians. The foremost mathematician of his time offered to help them with the problem. Upon hearing the problem, he told the delegation that they could come back in the morning and he would have solved the problem. In the morning, they came back, and he handed them a piece of paper with the computations for the new, 300% improved milk cow.

The plans began: "A Proof of the Attainability of Increased Milk Output from Bovines: Consider a spherical cow......"

- credit for this version of the joke: http://saullular.tripod.com/cow/ Hat tip www.sphericalcow.net

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*Note:*The cow is from Light and Matter.)