While talk of solo movies and various new trailers are cool and all, no one can deny Fox is knocking it out of the park on the viral front for X-Men: Days of Future Past, and the latest addition to the campaign might just be the studio’s finest work to date.

First, let’s start with this:

At the end of this ominous video is a URL to this website: 25moments.com

At the new viral site, fans can explore various moments in history that were altered as a result of mutant kind in the X-Universe, moments such as the Berlin Wall still standing to serve as a divider between mutants and humans, Chernobyl being a catalyst for the birth of highly developed mutants from a supremely young age, and a story explanation for why Hank McCoy will not be seen in his adult, Kelsey Grammer-infused self in the future timeline of the upcoming film.

This really is a nifty little site that’s worth a few minutes of your time if you can spare it.

X-Men: Days of Future Past opens in theaters May 23rd.