Back in June 2014, it was announced that scientists had proven that time-travel into the past is possible.
An article, entitled Experimental simulation of closed timelime curves,
was published in the peer-reviewed journal, Nature, which explained how
scientists at the University Of Queenland had successfully simulated
quantum particles traveling through time using photons.
(a photon is an elementary subatomic particle, the quantum of light and every other form of electromagnetic radiation).
two different cases of simulating the behaviour of two photons
interacting with each other, in the first case a photon passed through a
wormhole and then, rather amazingly, started interacting with it's
older self. In the second instance, a photon traveling through normal
space-time interacted with a photon that was permanently trapped inside a
closed timeline curve.
The results of the experiment demonstrate
how the 'grandfather paradox' could be resolved at the quantum level. The
'grandfather paradox' says that if someone went back in time and did
something to prevent their own grandparents from meeting, then they
would never have been born and therefore would never have set out to
travel through time in the first place.
The theory that
time-travel is possible at the quantum level was first predicted in
1991, due to the fact that quantum particles almost behave beyond the
realms of physics. Whilst the results show that time-travel to the
past is only possible at the quantum level, it does prove that
time-travel at a large scale is not an impossibility, though is still
[ Image from Pixabay - Public Domain - http://pixabay.com/en/clock-wave-period-time-fear-439147/ ]