hmm...im not really good at relativity..tho i have read stuff abt it...heres what i think...
i have read that to travel thru time,you need to travel faster than the speed of light...some law or something...and because to travel at a certsin speed you need a certain amt of energy or something...so like some guy before explained...the speed you travel at or someything like that is represented as c.so the faster you go the more energy you need or something...so eventually you go so fast that you need a great amt of energy...so if you travel at the speed of light you would need infinite energy...i would take my encyclopedia and refer but im too lazy...
and the thing abt time travel...i heard that scientist are playing with the idea of merging a blackhole and whitehole together...that forms your wormhole...how its supposed to transport you thru time,i have no idea...
and anyway,if you travel thru time,wouldnt you end up in the middle of space or something?since the earth revolves,your probably gonna end up in the same place you were at a few hunderd years before or after but the earth would be some where else...unless you could travel with pinpoint accuracy...you might even end up finding your self in the core of the earth...right?i think i might need to explain this abit more...but my fingers are tired...
oh.and one more thing.if you went back thru time and kicked a rock which hit some guy accidentally you might end up screwing life...and if you died while in the future you would screw life up as well...and not to mention you would need infinite energy just to turn the universe back or forward in time,since the universe is infinite...
heh maybe im stupid or something...but whats a lepton???