viajar no tempo

Deixo mais um artigo da Scientific American, desta feita sobre as viagens no tempo. O pequeno excerto abaixo ilustra o tema e o esforço de fé exigido.

Suppose the difference were 10 years. An astronaut passing through the wormhole in one direction would jump 10 years into the future, whereas an astronaut passing in the other direction would jump 10 years into the past. By returning to his starting point at high speed across ordinary space, the second astronaut might get back home before he left. In other words, a closed loop in space could become a loop in time as well. The one restriction is that the astronaut could not return to a time before the wormhole was first built.

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