Or do we but we just don't realise it?\n\nWhat if you were in like this hypothetical supertrain-car-thing which is like 7 storeys high and like really long and there was a huge trampeline in it. It's moving like 200 miles an hour and then, we jumplike 6 storeys high, would we move backwards being up for like kinda long?\n\nAssume this train thing is just like a car, no superduper depressurizer blahblahs or whatever..
214757
An object in motion remains in motion unless it is acted upon by an outside force.  Say you're traveling in a train going 200 miles an hour, jumping on a trampoline.  Before you jump, both you and the train are moving 200 miles an hour forward.  When you jump, you'll begin moving upward at about 5 mph, but you'll still be going 200 mph forward as well, just like the train.  When you come back down, you'll meet the trampoline exactly where you left, because you, the train, and the trampoline have all been moving forward at the exact same speed.  Here's another example:  The circumference of the earth is around 24,000 miles, and the earth completes one revolution per day.  That means that, in one day, you travel in a 24,000 mile circle, yet you don't feel that you are moving because everything else is moving at the exact same speed.
301187
GOOD IDEA.\n\nEven better - why not build more of the Japanese train (there's a small one in the UK too) which travels on the +/- polarity of magnets along with an accelerator.\nThere is no friction at all with these, and, apparently, no limit to a top speed !\n\nThere are no environmental issues either.\n\nBig question though, would the oil/gas companies allow it, seeing it would destroy their business ?
218029
I doubt it, I think it's just one problem that someone put forward to explain why Time Travel would be impossible, some of the first examples given were the Grandfather Paradox and the Butterfly effect but loads of Oxymoron's exist such as "American Military Intelligence!"  but what's the point of being an oxygen breather if you can't be a moron :0)
261864
I haven't.But.......\n\nTime travel has been a popular science-fiction theme since H. G. Wells wrote his celebrated novel The Time Machine in 1895. But can it really be done? Is it possible to build a machine that would transport a human being into the past or future? \nFor decades, time travel lay beyond the fringe of respectable science. In recent years, however, the topic has become something of a cottage industry among theoretical physicists. The motivation has been partly recreational-time travel is fun to think about. But this research has a serious side, too. Understanding the relation between cause and effect is a key part of attempts to construct a unified theory of physics. If unrestricted time travel were possible, even in principle, the nature of such a unified theory could be drastically affected....
457395
It's all theory, we don't know if (something) can exceed the speed of light. I would argue that time would be void at that moment, but again it's my theory. Interesting thought though.
219006
Wow..!! sounds like a nice concept..we can take a movie out of it !! Good Story line..\n\nBut how do we interact with the Non-Existent People ?  Shoud we keep our Mind open for that ??  Because I have often heard some saying.. those who believe in Ghosts can only see them.. - If that is the solution..  To go to a past.. do we have to just keep searching for open Minds ? or Can the Time Travel Concept be corolated with the Open-Mind Concept ..   \n\n- I wanted to get some best answers.. and finally ended up in having so many questions :)
603562
According to that old song, "...the Father, Son and the Holy Ghost, They took the LAST train for the Coast !"\n...Can't really understand how the Holy Ghost could have found an alternative transport to get back, or the money to buy the ticket. Guess, it must have hitch-hiked all the way !\n...Anyhow, say 'Hallelujah !' to friend Ghost - and wish it well. That's the least we can do !
395930
Does night actually move faster than day?\n\nThat doesn't really make sense, because while it may be night in one place, it will be day on the other side of the world. So they must both be moving at the same pace to be happening simultaneously, right?\nSorry I can't be more help, but I believe they both move at the same pace.
149837
'Flatland' must be a very exciting story. I wish I have read it.\n--a 2d world surely is a more interesting place compared to a 1d world. Roughly speaking, the added options would be 'left', 'right', 'up', 'down', which are far more entertaining than the 'forward' and 'backward' of the 1d space. \n-- the 3d world easily beats a 2d world and needs few comments. we get 'depth', just to name one thing we would miss in the 2d world. there are many others, no doubt.\n-- a 4d world would be an awesome place. before else, the question is what do we put on the 4th dimension. whatever would be it must have the dimension of space. so it can be time times velocity. let's say we neglect what velocity would mean and just focus on time. now things are going to heat up. what can we do with time, if we are able to use it just as we use the ordinary space? surely we would like to move forward and backward in time. still, I would not think we would be able to see .... ohhh wait a second!! this is really cool! I think I just got your idea of seeing 'inside and out, of every object and event in the entire univers'. yes, it must be this, because we would be able to travel in time, along the 4th direction, and we would be able to see things as they evolve; suddenly appearing in what was before an apparently empty space, turning into real objects and dissapear eventually. hehe I like it
86038
Finally a way for me to pick up that 7-10 split!  :)\n\nI agree with the basic premise of oscillating assuming a vacuum (since we are assuming no molten core, why not a vacuum as well?).\n\nBut, depending on the direction of the hole in relationship to the rotational axis of the earth, wouldn't the ball start bouncing against the sides of the hole due to the mechanics similar to that of a Foucault Pendulum?
528910
the one who answered first... plzzzzzzzzzz\n\nexcellent answer but.. trains moving towards each other can also be said to move in opp directions.
445132
Hi!\nI also think that it is impossible for humans to be alone in this vast Universe ....\nIn fact I believe there are some primitive civilizations here in our galaxy at approximately 31000 light years away, some antique civilizations at 3,1 millions light years away, an evolved civilization at approximately 100 million light years and that in the Universe could exist some 3000 "super - societies" and at least 300000 similar to ours in terms of technical evolution. Still there is that old problem: if they exist, why we didn't manage to "get in touch? After all, this "is" the main objective of S.E.T.I and so far ...nothing.\nThere are some explanations for all this - great distances which actually limits the possibilities of a "radio communication",  the great consumption of energy in order for such a long travel to became possible even in an unconventional way (such us      teleportation) and the  ultimate barrier - speed of light....\nIs there life out there?..... As the "Drake'" equation shows, the probability is very high (there isn't a connection between the figures I wrote earlier and the Drake equation).In the end we simply can not prove anything related to this issue but I guess that questions like this makes life is so interesting
11717
Einstein said we are living in the past time, that means we have not "now time"!\nSo, nobody can not answer, what time is it! maybe we can ask, what time was it!!
117959
I am sure someone cleverer will come along and shoot holes in this but I think this has a lot to do with Newton's 3 Laws (Newton being a clever dead bloke).\n\nForce: When you kick your sister in the shin you are using force\nMass: If she is fat, she has lots of mass\nInertia: Being fat, she will not be able to chase you. She has inertia. \n( Example from - http://www.allworldknowledge.com/newton/index.html)\n\nSo you are on the train and you are moving - its worth remembering that gravity (the force which keeps you on the floor) only goes downward not along. You on the train are moving along and the 'force' of the train going along, keeps you going along. Get it?\n\nWell you're still going along, watching the world go by, and then you jump.\n\nBy jumping you're still going along with the direction of the train thats one force. But when you start coming down it's the gravity pulling you back, as another force. The train moving you along hasn't changed, you just have two forces one pulling you down (the jump) and one pulling you along (the train).\n\nSo you end up in exactly the same place. With a few miserable commuters.
71258
Yeah! Have you been reading the magazine Popular Science? I guess so. The flying cars have to be aero dynamic and there is a 50% chance that they would make it. Also NASA might build a supersonic plane from here to Tokyo in 2 hours. Isn't that amazing! I wonder if they could build that too.
178241
I watched a Discovery Channel Feature bout time and space,\nand one guy said that the present laws of Physics do not\nprohibit time travel... so it is a possibility.\n\nThe concept is so real that I think people from the future are walking amongst us today. They are more stronger, tougher, faster, and smarter. From the future, they are sent to our time to rule everybody else. I know one. His name is Ben Wallace.
139579
Oooooh what a cool question... more philosophical than scientific in my opinion.\n\nI think you're right in theory.  If there is only one time line then stopping humans (and everything) from evolving (which would take quite the disaster) would mean that our time traveler (assuming he's human) would have never existed and he could never have stopped evolution... it's an infinate loop really, or impossible.  A lot of people say that if time travel is possible, it's only possible in forward time.  Although there are ideas about multiple universes and looping time, and parallel timelines that can explain things like this and Donnie Darko. Haha, fun question.\n\n\n\n\nVeck.  First of all it's more a question about time travel than evolution.\n\nSecond evolution definately has NOT been abandonded by the scientific community.  It is still our best answer and there is too much indirect evidence to throw such a good theory away.  But you are right... it is "just" a theory, just like gravity... better not rely on it ;)