Microsoft co-founder Paul Allen has spent the last six years working on a giant aircraft capable of launching rockets to space. Today, his company Stratolaunch Systems literally rolled that plane out of its hangar in the Mojave Desert for the first time ever.

Space shuttle Atlantis launches from pad 39A on July 8, 2011 at the NASA Kennedy Space Center in Cape Canaveral, Florida. The launch of Atlantis, STS-135, is the final flight of the shuttle program, a 12-day mission to the International Space Station. (Photo by Bill Ingalls/NASA via Getty Images)

Face Off is an American reality television game show on the Syfy cable network in which a group of prosthetic makeup artists compete against each other to create prostheses such as those found in science fiction and horror films.

Coffins are lined up near the wreckage of the bus, on July 29, 2013. (Photo by Salvatore Laporta/Associated Press)

Face Off is an American reality television game show on the Syfy cable network in which a group of prosthetic makeup artists compete against each other to create prostheses such as those found in science fiction and horror films.

Face Off is an American reality television game show on the Syfy cable network in which a group of prosthetic makeup artists compete against each other to create prostheses such as those found in science fiction and horror films.

A gannet grabs a fish by its beak, 2014, in Shetland, Scotland. Hundreds of gannets crash into the sea in search of food – leaving a trail of air bubbles in their wake. Richard Shucksmith, 41, on the Shetland Isles, Scotland captured the remarkable scene as he took a boat to feed the large colony of seabirds that nested on the cliffs. The photographer has taken images of the gannets every summer for the last three years as the birds gather on the cliffs to breed. (Photo by Richard Shucksmith/Barcroft media)

An unmanned Antares rocket is seen exploding seconds after lift off from a commercial launch pad in this still image from video shot by Matthew Travis of Zero-G News from the press area at Wallops Island, Virginia October 28, 2014. The 14-story rocket, built and launched by Orbital Sciences Corp, bolted off its seaside launch pad at the Wallops Flight Facility at 6:22 p.m. EDT/22:22 GMT. It burst into flames moments later, then plunged to the ground in a huge ball of fire and smoke, but authorities said no one was hurt. The cause of the accident was not immediately known. (Photo by Matthew Travis/Reuters/Zero-G News)