michel123456

That's the way I understand it, yes. If you want to look for negative mass, you must insert negative distance. Both of which are totally counter intuitive and aphysical.

I understand Lemur. If you take a macroscopic object made of a huge amount of atoms, and heat it, the object generally will expand (except for water). If you take energy out by reducing the temperature, the object will contract. In this view volume is related to energy. Isn't it the same at the atomic level?

Look here at the Computer History Museum. IMO the interesting part of computers history is in the inter-relations of theoretical developments (sowtware) and instruments (hardware). And also the development of Human Interfaces Devices. All that began with existing devices from older technology transformed in order to build something new. Not so long ago, we were standing in front of typewriter and a tv screen combined with a kind of tape recorder. Although the transmission of voice through wires had been achieved a long time ago (the telephone), the new developments were based on the transmission of simple digits like the telegraph did, which was an older technology. The keyboard I use at this right moment is a remnant of the old typewriter, and my desktop is still a tv screen. My scanner is another development (maybe simplification) of a fax machine, which is a development of the telex. The real developments are hidden inside my pc tower, but also related to the transistor from radio transmitter devices. On the other hand, new original developments occured, like the mouse, in contrast with other steering wheels or aircraft control yokes used in video games. And the main use of all this is still the transmission of sounds and images and the storage of information, something we did in the past times with other means, like paper (remember also the music paper). Note that the printing machines are a remnant of this 3000 years old technology. IMHO we only begin to see inventions created especially for the new purpose. It may come a time when all printers will become obsolete (the e-book is here), personally I don't print photographs any more, and a lot of e-mails disclaimers say to not print in order to protect environment. As a result, scanners and home bookshelves will disappear too. I suppose even the screen display will go to the museum. We have a lot to see yet. ----------------- edit: I made a great omission not speaking about the calculation skills of computers: Here is one of the first comments about the Babbage invention: Again, who can foresee the consequences of such an invention? In truth, how many precious observations remain practically barren for the progress of the sciences, because there are not powers sufficient for computing the results! And what discouragement does the perspective of a long and arid computation cast into the mind of a man of genius, who demands time exclusively for meditation, and who beholds it snatched from him by the material routine of operations! Yet it is by the laborious route of analysis that he must reach truth; but he cannot pursue this unless guided by numbers; for without numbers it is not given us to raise the veil which envelopes the mysteries of nature. Thus the idea of constructing an apparatus capable of aiding human weakness in such researches, is a conception which, being realized, would mark a glorious epoch in the history of the sciences. from here.My link

Then I didn't interpret the diagrams correctly. I thought the orbital was only the outer surface of the "bubbles".

http://en.wikipedia.org/wiki/Antikythera_mechanism http://en.wikipedia.org/wiki/Automaton http://en.wikipedia.org/wiki/Pascal's_calculator http://en.wikipedia.org/wiki/Piano_roll (good picture here) http://www.computerhistory.org/babbage/ http://en.wikipedia.org/wiki/Abacus http://www.homelessdroids.com/post/2776926334/this-was-a-very-rare-find-indeed-an and http://en.wikipedia.org/wiki/Mechanical_calculator http://en.wikipedia.org/wiki/Comptometer http://en.wikipedia.org/wiki/Arithmometer

How far in the past do you intend to go? Antiquity, or 20th Century?

I am glad that you say that. You must know that I am a supporter of that principle. Not to mention that IMHO this "something huge and very dense inside our past light cone" can still be there, if one can say that talking about the past. i have had turbulent discussions on this Forum about the interpretation of a spacetime diagram. I am still convinced that there is plenty of room for unobservable matter in our past cone. The Dark Flow is very interesting, but very speculative too.

Yes, it is the source of my question. Say that we are inhabitants of the Pi world, on the tenth digit. Looking at right, we see infinite, looking at left we look at the edge only 10 digits away. That makes our pi world totally asymetric. There is a beginning, there is no end. And there is a kind of flow coming from the beginning and going to infinite, even if Pi is a static geometric number (I mean Pi is not growing). That is bad analogy IMHO.

Hm. Following that logic the Big Bang is the edge of spacetime.

I think you are driving conclusions too quickly. Put all that in a diagram.

If you make a line starting at point zero and going to infinite, is it really representing something infinite? The question arises because the "infinite" line has a starting point: it has an edge. Can we say that something infinite can have an edge? I am confused. When something starts somewhere, in space or in time, it has a starting point (kind of tautology). Can we consider this starting point as an edge?

You can call me Michel. Like the one in your post #6 of the brother thread.

Albert was not sure.

Why don't we see that in orbitals diagrams?

If evolution is the result of natural selection acting upon random modifications like mutations, IMHO it is more likely to observe evolution on small populations, and not on large ones. Small populations can be found on small remote and isolate places like islands, or after a tragic reduction of population (due to a cataclysm), the bottleneck effect On the same link the founder effect which I haven't thought about.

Oops error, said the hedgehog and got down from the broom.

IMHO it is already the "next Chernobyl". Japanese dislike any comparison, because Chernobyl is associated with obsolete technology, bad conception, staff incompetence, governmental covering, disinformation, and panic imposing a sarcophage solution that looks like 5000 years old technology. IOW it was supposed that could happen only in Russia, other countries were safe. In japan, things ought to be completely different. But _obsolete technology appeared, since Fukushima is 40 years old. (1981) _bad conception appeared also. see here an article from International Business Times: _staff incompetence has appeared here and there in the press under the form of "mistakes" see here an article from The New York Times. _governmental covering is appearing right now IMO. _disinformation has been argued, everywhere, and even here on this Forum. _panic happened, the world is waiting for the sarcophage solution. Now we know that the impact is worlwide (level 7). The only remaining difference is the cause.

Now that level 7 has been reached? I disagree. From CNN By Matt Smith, CNN April 12, 2011 They didn't hear. My bet is 50% correct so far.

Is it? I changed my avatar yesterday, it does not appear on the forums, but appears under "my settings".

If the Earth were expanding, it would be measurable. What measurements show is rather a stand-by situation. See here an article about the Earth measured slightly less than thought. But even in the expanding earth theory, the animation is peculiar. The Earth is supposed to begin as a small dry planet, then as it expands, oceans appear in the cracks. Why? Where do the water come from? And also, where is the explanation for the mountains? And ... there is no conspiracy.

Allow her another wish.

I am far from an expert in Vatican II issues. looking at the wiki article I don't see anything related to this thread or your post. Oh yes. "for reasons that may be purely cultural". You must be kidding. Do you believe also that "for reasons that may be purely cultural" there are no gays in Iran, or maybe because homosexualism is totally forbidden. You should open your eyes and look at reality. Where you see a lot of unhappy couples in some country, and a lot of divorces, it is not a "cultural" issue, it is simply because disagreement in couple can be openly showed, because women have rights, and because divorce is allowed. If you take another country where divorce is not allowed, it is obvious that statistics will report no divorce in yhis country. Not that you can assume all couples are happy there. Same objection. Do you figure a Saudi woman arguing her husband has raped her? You must know how difficult it is in the West, not to mention in Saudi Arabia. From Misconceptions about women in Islam suggested above: emphasis mine No other comment.

Position in spacetime is a 4 coordinates. So I suppose it can be broken, at least in four.

Storms can lie down trees in the same direction. See HERE an article about the 1987 storm. IIRC the trees in the petrified forest in California are also parallel to each other in south-west direction. In the petrified forest of Lesvos they are still upright.

It is not a good idea IMO to replace a subject we have difficulties to understand with another even more difficult. What is energy? What is kinetic energy? Quite the contrary. Do you remember those little pocket games with squares you had to slide from one place to other in a step by step procedure (forgot the name): those games work only because there was a square empty. Emptiness was necessary to allow movement. You are thinking of emptiness as an obstacle. I my view emptiness is the absence of obstacle. Nothing is obvious. We all do.