I'd add here that the observations of this research aren't that striking. We've known for some time that time may not be a single direction arrow but rather one pointing both ways, dependent on what we're observing and our classification of what's possible.

In his book Your Brain is a Time Machine, Dean Buonomano gives an excellent and well-written example of how studies like the one reported here actually work. A favorite quote of mine from that section sums the point as so:

"Decreases in entropy are improbable, not impossible, and given enough time the improbable becomes probable."