Page 87 - (DK) Danger! Open with Extreme Caution!
P. 87

FASTER THAN THE SPEED OF LIGHT                                    GRANDFATHER PARADOX
        Einstein’s theory of relativity shows that time slows as          If you went back in time and accidentally killed your
        an object nears light speed—more than 671 million mph             grandfather before your father was born, you couldn’t
          (1 billion km/h). Anyone traveling in space close to               exist. Some scientists say that nature would stop
           the speed of light would age less than those left behind          this paradox, while others think that the event
           on Earth. So traveling faster than light speed could,             would create parallel worlds, so Grandpa would
           in theory, allow time travel.                                     live on in the world “next door.”



                                                                            grandfather!
                                                                           Is that you? But
                                                                           I acCidently ran
                                                                           you over in 1946!


   DEPARTURES: TERMINAL 1                             BLACK HOLES
                                                      Wannabe time travelers could also jump through
                                                      a rotating black hole. This would then carry them
                                                      along a wormhole to an exit point, or “white
                                                      hole,” at another point in time. However,
                                                      travelers would need to zip through to
                                                      the other side faster than the speed
                                                      of light so that they are not
                                                      crushed by the black hole.
                                                      Oh, and after all that,
                                                      the travelers must
                                                      find a safe way back!














      DISAPPEARING ACT
                                                ARRIVALS: FUTURE
      All this talk about time travel could
      make anyone giddy with excitement.
      Why would people wait for the future    BLASTS FROM THE FUTURE
      to arrive one day at a time when they   Ever fantasized about what the future might hold? Perhaps we
      can get there anytime they want?
                                              finally meet aliens and vacation on Venus. But, if time travel is
      And, if the future turns out to be so   possible, what if criminals go back in time to blast us with
      amazing, why would they ever want       high-tech weapons that we can’t defend ourselves
      to return to the here and now?          against? It hasn’t happened yet, so hopefully
      This one-way ticket could mean          any time travelers will simply be
      a disappearing population problem
                                              well-wishers with information about     30005
       for the present.
                                              amazing new medicines and how to
                                                solve global warming!

                it rains
               donuts in
              the future!







           what are we                                             arRrRrgh!
           waiting for?!
                                                                                         TRAVELING THROUGH TIME     87
                                           (c) 2011 Dorling Kindersley. All Rights Reserved.
   82   83   84   85   86   87   88   89   90   91   92