Via a cool little post at io9, here is a recent actual abstract for research on the topic. The paper is here in PDF. The physicists involved hail from MIT, the Scuola Normale Superiore (in Pisa, Italy), and the Tokyo Institute of Technology. Upshot: paradox-free time travel? Or at least (gratuitous "Doctor Who" reference in 3... 2... 1...), WIBBLY-WOBBLY TIMEY-WIMEY!
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