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A comment on Travel through wormholes is possible, but slow. Parent comment

Re:Travel through wormholes is possible, but slow by saagarjha on Monday April 15, 2019 @01:22PM (#19666994)
Shadows are an abstract concept (namely, the absence of light), not a physical thing.
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Re:Travel through wormholes is possible, but slow by smoyer on Monday April 15, 2019 @06:38PM (#19669527)
I would argue that shadows are a very physical effect.
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