Save Patient Zero or Kill Baby Hitler: Paradox-Free Time Travel Proven Possible, but Risky

When you go back in time to prevent patient zero from catching COVID-19 — or to kill baby Hitler — be careful.

Previously, we thought your time-travel action would thus eliminate the need for your time travel and therefore you’d never go back in time.

But it’s a paradox no longer, if you believe University of Queensland student Germain Tobar and his UQ professor Fabio Costa. Tobar mathematically proves that paradox free (non-trivial) time travel is possible…but personally risky.

Background Resources:
A Student Just Proved Paradox-Free Time Travel is Possible
[Popular Mechanics, September 25, 2020]
Reversible Dynamics with Close Time-Like Curves and Freedom of Choice
[Germain Tobar and Fabio Costa, Classical and Quantum Gravity, September 21, 2020]

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