Why regularity for Navier-Stokes is Hard. It would be fun to return to this problem someday. Deep in a filing cabinet, I have a folder thick with sheets of paper covered with five-year-old chicken scratch that amounted to me just trying to better understand the problem.

Another thing that would be fun to spend more time on someday is quantum field theory in all its technical glory. At least I'll know what books to buy.

Is the U.S. finally de facto partitioning Iraq? One can only hope. Good walls can last quite a while. By definition, surges cannot.

A cartogram of the nations supplying Wal-Mart. (HT: MR)

When a math nerd gets bored... (I got suspicious after mentally checking for prime factors through 19. Then I had a computer confirm that 1453 is prime.)

Theorem. There is a self-righting three-dimensional solid shape.

Anything you can do I can do meta...

Is there actually a blog out there that could increase rather than decrease my productivity? Maybe...

I want my hour back, with interest. (HT: Randall Parker.)

Educational vouchers are old news in the Netherlands and Chile, where the majority of children are now enrolled in private schools. Sweden and Denmark have voucher programs too. Read more here.

"Self-sufficiency is the road to poverty."

A growing world economy can explain most of the increase in oil prices over the last few years. See the graphs.