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Sat, 10 Sep 2011 13:29:53 -0400

“This feeling that I getThis one last cigaretteAs I lay...

Fri, 09 Sep 2011 00:45:02 -0400

“This feeling that I get
This one last cigarette
As I lay awaken and wait for you to come through the door
Oh maybe I can share it with you.”

Heyyy babe, let's fuck.

Thu, 08 Sep 2011 22:52:12 -0400

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Thu, 08 Sep 2011 21:45:13 -0400

lindastrawberry: camera cake!

Thu, 08 Sep 2011 21:18:53 -0400

lindastrawberry:

camera cake!

10 Things Everyone Should Know About Time

Wed, 07 Sep 2011 12:41:14 -0400

10 Things Everyone Should Know About Time:

youmightfindyourself:

“Time” is the most used noun in the English language, yet it remains a mystery. We’ve just completed an amazingly intense and rewarding multidisciplinary conference on the nature of time, and my brain is swimming with ideas and new questions. Rather than trying a summary (the talks will be online soon), here’s my stab at a top ten list partly inspired by our discussions: the things everyone should know about time. [Update: all of these are things I think are true, after quite a bit of deliberation. Not everyone agrees, although of course they should.]

1. Time exists. Might as well get this common question out of the way. Of course time exists — otherwise how would we set our alarm clocks? Time organizes the universe into an ordered series of moments, and thank goodness; what a mess it would be if reality were complete different from moment to moment. The real question is whether or not time is fundamental, or perhaps emergent. We used to think that “temperature” was a basic category of nature, but now we know it emerges from the motion of atoms. When it comes to whether time is fundamental, the answer is: nobody knows. My bet is “yes,” but we’ll need to understand quantum gravity much better before we can say for sure.

2. The past and future are equally real. This isn’t completely accepted, but it should be. Intuitively we think that the “now” is real, while the past is fixed and in the books, and the future hasn’t yet occurred. But physics teaches us something remarkable: every event in the past and future is implicit in the current moment. This is hard to see in our everyday lives, since we’re nowhere close to knowing everything about the universe at any moment, nor will we ever be — but the equations don’t lie. As Einstein put it, “It appears therefore more natural to think of physical reality as a four dimensional existence, instead of, as hitherto, the evolution of a three dimensional existence.”

3. Everyone experiences time differently. This is true at the level of both physics and biology. Within physics, we used to have Sir Isaac Newton’s view of time, which was universal and shared by everyone. But then Einstein came along and explained that how much time elapses for a person depends on how they travel through space (especially near the speed of light) as well as the gravitational field (especially if its near a black hole). From a biological or psychological perspective, the time measured by atomic clocks isn’t as important as the time measured by our internal rhythms and the accumulation of memories. That happens differently depending on who we are and what we are experiencing; there’s a real sense in which time moves more quickly when we’re older.

4. You live in the past. About 80 milliseconds in the past, to be precise. Use one hand to touch your nose, and the other to touch one of your feet, at exactly the same time. You will experience them as simultaneous acts. But that’s mysterious — clearly it takes more time for the signal to travel up your nerves from your feet to your brain than from your nose. The reconciliation is simple: our conscious experience takes time to assemble, and your brain waits for all the relevant input before it experiences the “now.” Experiments have shown that the lag between things happening and us experiencing them is about 80 milliseconds. (Via conference participant David Eagleman.)

5. Your memory isn’t as good as you think. When you remember an event in the past, your brain uses a very similar technique to imagining the future. The process is less like “replaying a video” than “putting on a play from a script.” If the script is wrong for whatever reason, you can have a false memory that is just as vivid as a true one. Eyewitness testimony, it turns out, is one of the least reliable forms of evidence allowed into courtrooms. (Via conference participants Kathleen McDermott and Henry Roediger.)

6. Consciousness depends on manipulating time. Many cognitive abilities are important for consciousness, and we don’t yet have a complete picture. But it’s clear that the ability to manipulate time and possibility is a crucial feature. In contrast to aquatic life, land-based animals, whose vision-based sensory field extends for hundreds of meters, have time to contemplate a variety of actions and pick the best one. The origin of grammar allowed us to talk about such hypothetical futures with each other. Consciousness wouldn’t be possible without the ability to imagine other times. (Via conference participant Malcolm MacIver.)

7. Disorder increases as time passes. At the heart of every difference between the past and future — memory, aging, causality, free will — is the fact that the universe is evolving from order to disorder. Entropy is increasing, as we physicists say. There are more ways to be disorderly (high entropy) than orderly (low entropy), so the increase of entropy seems natural. But to explain the lower entropy of past times we need to go all the way back to the Big Bang. We still haven’t answered the hard questions: why was entropy low near the Big Bang, and how does increasing entropy account for memory and causality and all the rest? (We heard great talks by David Albert and David Wallace, among others.)

8. Complexity comes and goes. Other than creationists, most people have no trouble appreciating the difference between “orderly” (low entropy) and “complex.” Entropy increases, but complexity is ephemeral; it increases and decreases in complex ways, unsurprisingly enough. Part of the “job” of complex structures is to increase entropy, e.g. in the origin of life. But we’re far from having a complete understanding of this crucial phenomenon. (Talks by Mike Russell, Richard Lenski, Raissa D’Souza.)

9. Aging can be reversed. We all grow old, part of the general trend toward growing disorder. But it’s only the universe as a whole that must increase in entropy, not every individual piece of it. (Otherwise it would be impossible to build a refrigerator.) Reversing the arrow of time for living organisms is a technological challenge, not a physical impossibility. And we’re making progress on a few fronts: stem cells, yeast, and even (with caveats) mice and human muscle tissue. As one biologist told me: “You and I won’t live forever. But as for our grandkids, I’m not placing any bets.”

10. A lifespan is a billion heartbeats. Complex organisms die. Sad though it is in individual cases, it’s a necessary part of the bigger picture; life pushes out the old to make way for the new. Remarkably, there exist simple scaling laws relating animal metabolism to body mass. Larger animals live longer; but they also metabolize slower, as manifested in slower heart rates. These effects cancel out, so that animals from shrews to blue whales have lifespans with just about equal number of heartbeats — about one and a half billion, if you simply must be precise. In that very real sense, all animal species experience “the same amount of time.” At least, until we master #9 and become immortal. (Amazing talk by Geoffrey West.)

freeindie: Jimi Hendrix and Bob Marley kickin’ around a soccer...

Tue, 06 Sep 2011 01:45:46 -0400

freeindie:

Jimi Hendrix and Bob Marley kickin’ around a soccer ball

Audio

Mon, 05 Sep 2011 16:50:55 -0400

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Mon, 05 Sep 2011 16:15:11 -0400

Who invited the Power Rangers to this party?

Mon, 05 Sep 2011 14:10:37 -0400

Who invited the Power Rangers to this party?

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Mon, 05 Sep 2011 14:09:25 -0400

sexmusic: will there be enough water? // the dead...

Sun, 04 Sep 2011 01:42:27 -0400

sexmusic:

will there be enough water? // the dead weather

download: amazon mp3 | itunes

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Sat, 03 Sep 2011 22:20:40 -0400

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Wed, 31 Aug 2011 12:33:52 -0400

avalanche: Red Hot Chili Peppers / Make You Feel Better

Mon, 29 Aug 2011 20:15:54 -0400

avalanche:

Red Hot Chili Peppers / Make You Feel Better

thejeanicole: Henri Cartier-Bresson - New York, 1947

Sun, 28 Aug 2011 17:56:30 -0400

thejeanicole:

Henri Cartier-Bresson - New York, 1947

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Sat, 27 Aug 2011 21:38:16 -0400

WHO WRINKLED MY RANDY TRAVIS POSTER

Fri, 26 Aug 2011 19:07:16 -0400

oeaki:

Everything Feels Like Rain

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“This feeling that I getThis one last cigaretteAs I lay...

Heyyy babe, let's fuck.

Photo

lindastrawberry: camera cake!

10 Things Everyone Should Know About Time

freeindie: Jimi Hendrix and Bob Marley kickin’ around a soccer...

Audio

Photo

Who invited the Power Rangers to this party?

Photo

lol

sexmusic: will there be enough water? // the dead...

Photo



Photo

avalanche: Red Hot Chili Peppers / Make You Feel Better

thejeanicole: Henri Cartier-Bresson - New York, 1947

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WHO WRINKLED MY RANDY TRAVIS POSTER