To help remember the number of each corner.

The way I understand it, the Dunbar number does not limit your personal number of Twitter friends, but sets a limit on the maximum size of a cohesive Twitter group.

There's a lot of confusions about how to differentiate between a risk of a risk and simply a risk. The Language Log looked at New Scientist, and found that writers tend to use "can cause" for cases where a threat is proven to exist, and "may cause" where a threat may exist. [languagelog.ldc.upenn.edu]

This one's over Don's pay grade. Send in Nick Naylor.

Isn't Ellison a follower of Ayn Rand? His neighbor is just pursuing his own rational happiness on his own property. I wonder what Rand would say about Ellison using the government's guns to impose his will on another individual.

Iran tolerates the practice of other religions within its borders, including Christianity, Judaism and Zoroastrianism (the Ringo Starr of the ancient, monotheistic religions.) However, good luck opening a strip club there.

If all the adults disappeared and the world was run by children, this is how it would look.

That damn establishment, always trying to take people's bodies.

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I am having to promote your comment manually. I might as well add an interesting fact then: Britain's first choice of places to transport prisoners was North America, where it sent as many as 50,000 people starting in the 17th century. The Revolution forced them to seek another continent and led to the founding of…

Desalinating sea water requires about 4 watt-hours per liter. The escape velocity of the moon is about 2.5 km/s, so lifting water off of the moon alone will require 700 watt-hours per liter. (That's if you could lift it with a perfectly efficient tractor beam. A rocket would require much more energy.)

The military overcharging people for out-of-date hardware? That's not the way the military-industrial complex is supposed to work.

Well, someone did leave it on our doorstep. What were we supposed to do?

The reason they can make black holes without risking life on Earth is that black holes evaporate. And the smaller they are, the faster it happens. At this scale, the black holes evaporate unimaginably quickly meaning they don't have any time to come into contact with other matter.

Looking at the second Powerpoint, I'm betting the creator's house is full of Thomas Kinkade paintings, some collectible plates, most likely featuring cats and a DVD collection made up exclusively of Jim Carrey movies.

Yep, they're limited in the same way that other objects with mass are. Rotation causes the singularity to become a ring which has a physical size and a limited velocity. It can always increase its angular momentum, but relativity ensures the velocity does not exceed the speed of light.

It might not be very fast, but being made of cloth and wooden dowels, I'm guessing it's one of the stealthiest aircraft ever built.

Not if oil prices keep going up and alternatives become more competitive. Exponential growth is always bound to hit a limit sooner or later.

How is that in any way easier than pressing a button? On the Kindle, turning a page is as simple as twitching one muscle in your thumb. (This is also, incidentally, how you turn the pages of a real book. The only book that gets swiped is a desk dictionary.)