you get nothing in return

FB users get a significant amount of utility out of Facebook, and of course it comes at a cost. It looks extremely lop-sided because there's only one facebook and there are a billion or so users, but saying that users get nothing from it is just as stupid as saying that it costs users nothing.

Here's a good visual of that concept.

but the Antarctica Journal of Mathematics has such a great webpage.

Thomas Gold wrote a book that seems very pertinent to this.

You can with an iPhone 4. The voice commands work well and don't send anything to Apple.

You are correct, except that the parent was talking about the definition of Mersenne numbers, not Mersenne primes.

I'll second the .28 mm uni-ball signo. It's the best thin-line pen I've ever used. It's great for doing neat, precision writing, but I can't write very fast with it. In my opinion the .18 is a little too small. I haven't tried the .38 version.

I've also tried the Pentel Slicci .25 mm pens, as mentioned by other posters, but I don't like them as well.

For a thicker-writing pen, I highly recommend the Uni-ball vision elite micro.

Rucker's "the fourth dimension: toward a geometry of higher reality" is a very good read, or at least i really enjoyed it when i was in high school. Much of the book is about Flatland, with a lot of commentary and additional ideas about A. Square. I'd recommend it.

Download it while you're at the university.

That first picture reminds me of watching cinemax when I was a teenager, minus the naked women.

I'd suggest a $100 or so USB microscope. You can use it to look at opaque objects, and you can have the picture on your computer screen. That would be a big help when trying to point out what the kid is seeing.

Wikipedia says that the boxer linked to above is 6'3", and the other link says that "In the modern era, middleweight means that the fighter's official weight does not exceed 160 pounds."

But all of that is beside the point. Using height and weight to determine how well someone can fight is like using clock speed to determine how fast a computer is.

And 160 lbs at 6'3 is so skinny as to be a total non-threat.

Henry Maske and I'm sure plenty of other middleweight boxers would disagree.

Mr. Soupy Sales

They have 13$ arduinos.

If you're making more than one device you can go even cheaper if you just buy a bare ATMega328 + a couple of cheap components. Granted, you also need a USB to TTL cable which is another $20 or so, but you only need one of those.