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Supertopics:
Time

Time Travel (Time Machines)

Documents:
Percival Dunwoody goes back to warn his young self
webRuben Bolling2020-04-27
Ziggy gets warned about a time machine
webTom Wilson2019-07-04
five steps to beat the global warming heat
webMcFadden, Brian2018-07-30
time travel without the space travel
webRuben Bolling2017-10-03
Calvin's time machine circular logic
webBill Watterson1992-05-21