Earth X is a classic that deserves way more praise than it gets. Here’s why. By David Harth. ... recruits X-51 to act as his eyes for what Uatu says is the end of the Earth.

The X-51's scramjet, fueled andcooled by conventional JP-7 based kerosene, will then complete the climb toabout 100,000 ft. firing for a planned 300 sec. while accelerating to Mach 6.5— more ...

America’s experimental X-51 Waverider made its final flight on May 1, 2013. The unmanned scramjet-powered vehicle flew over six minutes, reaching a top speed of Mach 5.1 as it was designed to do.

This fall, DC fans got to see the best superhero team-up ever rendered in live-action. But we’re not talking about Justice League. And that’s because the Arrowverse crossover event, “Crisis ...

An Earth-X version of Prometheus will also show up, but it won’t be Adrian Chase (Josh Segarra) underneath the hood. It hasn’t been revealed who will be playing the new version of that villain.

The second flight of the hypersonic Boeing X-51 waverider ended prematurely due to an inlet unstart. The aircraft made a controlled crash into the Pacific Ocean off the California coast on 13 June.

The "Crisis On Earth-X" crossover has officially aired on The CW. Read on for all the ways the shows of the Arrow-verse will be different moving forward.

“Crisis on Earth-X” was a bit different: in addition to being pretty stand-alone, the story had a pace that really did flow from episode to episode in an organic way.

First up is Supergirl with "Crisis on Earth-X, Part 1," which airs Monday, November 27 at 8pm EST. Supergirl: "Crisis on Earth-X, Part 1" Photos. View 29 Images.

Warning: Full spoilers for the episode below. Make sure to also check out our review of Arrow's "Crisis on Earth-X, Part 2." This year's big Arrowverse crossover already has one huge advantage ...

The next big Arrow-verse crossover is only days away from debuting on The CW, and a brand new trailer has hit the web that gives the closest look yet at the horrifying Earth-X. Check it out!