As described in the book Becoming Timefaring: Time Travel & the Human Future (Cup+Saucer Press, 2025), a single time machine or “timeship” reversing its direction in time would have a distinctive, strange appearance—looking like multiple objects merging and vanishing or appearing out of nowhere. These animations are for reference.
A single timeship reversing its vector in time (“throwing into reverse”)

A single time-reversed ship rejoining the local temporal reference frame

A single timeship reversing its temporal vector and then rejoining the external reference frame (“S-shaped” switchback)
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A single orb timeship making multiple temporal switchbacks
