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Science 11 October 1996:
Vol. 274. no. 5285, pp. 202 - 203
DOI: 10.1126/science.274.5285.202
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Perspectives

Paul Parsons

The curved space and time of Einstein's theory of general relativity permits both time travel and travel at speeds faster than that of light. In his Perspective, Parsons describes recent theoretical studies that show how, in principle, a spacecraft in a bubble of warped space-time could travel faster than light. One consequence of this result is that such a spacecraft could also travel back in time.

The author is at the Astronomy Centre, CPES, University of Sussex, Falmer, Brighton BN1 9QH, UK. E-mail: pparsons{at}star.maps.susx.ac.uk




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Science. ISSN 0036-8075 (print), 1095-9203 (online)