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Letter: On the space-time vs spacetime debate

Published 1 October 2025

From Bernd-Juergen Fischer, Berlin, Germany

When it comes to the phrase space-time, Chanda Prescod-Weinstein ponders what is in a hyphen? Space answers to the question “where?”, time to the question “when?”. Space-time answers to the question “when and where?”. “Spacetime” answers to no question at all. It is a new concept that needs a lot of explaining (“what?”) and probably even a new interrogative (“whern”, maybe?)(6 September, p 22).

Issue no. 3563 published 4 October 2025

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