Nice description of science (physics in particular) from the JREF forums.

As it turns out, we know enough to make really incredibly detailed descriptions. So detailed, we can describe things that we can’t actually sense directly with our own senses. We can measure those things, and we can describe them, but we can’t see them. So how do we know they’re right?

The answer is, reality appears to be consistent. In other words, our universe appears to be a place where, although random things can happen, not just anything can happen. Only certain sorts of random things can. For example, if you get out of bed and walk to the store and buy some brewskis and come home and sit on the couch and drink one, you’re still you. You don’t turn into a penguin when you walk around the corner, and you don’t cease to exist when you sit down on the couch. And this implies some things about the nature of our universe- and those things add up to consistency. Rocks don’t just disappear, or appear out of nowhere. The planet beneath our feet is there all the time, and holds us to itself.

# Lots and Lots

Physics Buzz: How Much Snow did Washington DC REALLY Get?

Washington DC looks like a 10 x 10 mile square with a bite taken out of it. All together the city is 68.3 square miles. It’s not too hard to figure out the total volume of snow dumped on the city so far.

55.6″ depth of snow x 68.3 square miles roughly equals 8,820,000,000 cubic feet of snow, or 249,000,000 cubic meters. If you were to build a giant cube of snow that big it would be 2,066 feet, or 629 meters on each side. That’s almost two fifths of a mile or two thirds of a kilometer per side. That’s the volume of about 238 Empire State Buildings. That’s a lot of snow.

# It's Easy When Someone Else Does It

Starts With a Bang: A Brief History of Time… in the New World!

It was only about a week before people noticed that the Sun and Moon weren’t rising and setting at the times they were supposed to! Apparently, the clock was running at the wrong speed, and was running slow by somewhere around a minute per day. This brilliant clock, which was accurate to within two seconds a day in Holland, must have broken somehow during the journey.

So what were the colonists to do? There was no clockmaker (or clock repairman) in the new world, and this clock was handmade and very valuable. They had no choice; the clock needed to be shipped back to Europe for repair.

So they ship the clock back to Europe, and they go to take the clock into the clockmaker, and it does the exact thing that your car does when you take it to the mechanic because it’s making a noise. It starts behaving like it’s perfectly fine. The clockmaker winds up the clock, and it immediately starts working properly, and keeps time to within two seconds per day!

The needed to appreciate the gravity of the situation, of course.

A very nice story, up until the last sentence:

So go ahead and take your standardized time for granted, but remember that it wasn’t always as easy as it is today!

Easy for whom? The dragons currently live at several picoseconds per day instead of several seconds per day. Scientists doing research are always trying to be on the part of the map that says “Here be dragons.”

# The Demon's in the Details

Uncertain Principles: Entanglement Happens

(Oops. I accidentally hit publish instead of save yesterday, and didn’t add my comment. Hence the time travel on the post.)

There are several application people try and use entanglement to pull off some neat trick (e.g. clock synchronization) and the problems Chad points out are often glossed over. It’s almost like the famous Sidney Harris cartoon, “Then a miracle occurs,” when the step in the procedure is “we take our entangled particles and move them an arbitrary distance apart,” which ignores the little demons Chad describes, that compromise your ability to know the measurement basis after your system has been exposed to the real world. It’s not quite at the level of ignoring the second law of thermodynamics and proposing a perpetual motion machine, but it’s almost as naive to propose it for an arbitrary system, without working out the details.

# Die Hard

TED 2010: Death Star Laser Gun Zaps Mosqitoes Dead

Myhrvold demonstrated a “Death Star” laser gun designed to track and kill mosquitoes in flight. The device was crafted from parts purchased on eBay by scientists at Myhrvold’s Intellectual Ventures Laboratory.

Video here: High Speed Videography of Mosquitoes

The third video is the best one, showing the critters being smoked. Literally.

# I Wonder How it Ends?

Kottke three-fer

Insanely deep fractal zoom

The final magnification is e.214. Want some perspective? a magnification of e.12 would increase the size of a particle to the same as the earths orbit! e.21 would make a particle look the same size as the milky way and e.42 would be equal to the universe. This zoom smashes all of them all away. If you were “actually” traveling into the fractal your speed would be faster than the speed of light.

(Spoiler alert … The butler did it, and the chick is really a guy, and they faked their deaths to pull off the con)