Vortex, YES!

I'm having lunch with my dad today. He's getting an extra hard hug.

Hil, I did notice that. And don't forget what I said about secrets biting you in the ass. Mark my words.

I think it's good to periodically stretch out the ol' brain....

I've posted about this in the past, but here's some more info: Science hopes to change events that have already occurred

Dating back to Newton's laws of motion, the equations of physics are generally "time symmetric" -- they work as well for processes running backward through time as forward. The situation got really strange in the early 20th century when Einstein devised his theory of relativity, with its four-dimensional fabric of space-time. In this model, our sense that history is unfolding is an illusion: The past, present and future all exist seamlessly in an unchanging "block" universe.

"If you have the block universe view, the future and the past are not any different, so there's no reason why you can't have causes from the future just as you have causes from the past," says David Miller of the Centre for Time at the University of Sydney in Australia.

With the advent of quantum mechanics in the 1920s, the relative timing of particles and events became even less relevant. "Real temporal order in general, for quantum mechanics, is not important," says Caslav Brukner, a physicist at the University of Vienna, Austria. By the 1940s, researchers were exploring the possibility of time-reversed phenomena. Richard Feynman lent credibility to the idea by proposing that particles such as positrons, the antimatter equivalent of electrons, are simply normal particles traveling backward in time. Feynman later expanded this idea with his mentor, John Wheeler of Princeton University. Together they worked out a theory of electrodynamics based on waves traveling forward and backward in time. Any proof of reverse causality, however, remained elusive.

The article goes on to talk about the proposed experiment to see if an action can affect something in the past....

Or, you know, it may turn out that it is impossible to alter the past and also impossible to alter the future. Fun....

Even if it is possible to alter the past (which I actually can see), how would we know -- extensive note-leaving?

I'm a complete baby spoiler whore.

"If you have the block universe view, the future and the past are not any different, so there's no reason why you can't have causes from the future just as you have causes from the past," says David Miller of the Centre for Time at the University of Sydney in Australia.

Dear time,

Please have an arrow. The lack of one makes my brain hurt.

Love,

Causality.

HA!

Drivemoticons.

Like those cars in Japan with "faces" but much much cheaper!

I need one that just says "idiot". It would take care of 99% of my needed-to-be-expressed driving sentiments!

But seriously, what would you have done if you knew it was her? Still ignored her, I'd hope.

I have every confidence that ita could seamlessly start a conversation about krav with another partigoer that would require demonstrating an in-place back kick while still pointedly failing to realize that Paris was standing right behind her...

This might have caused problems for her Paris-costar friend, but would have ultimately resulted in parades held in her honor by a grateful nation.

Vortex, that totally bothered me too, for the record. Heh.